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The correct answers are A. Set up new public Chatter groups and D. Use post action on the Account object.

Public Chatter groups support open collaboration where company users can share information in a group feed. Salesforce Chatter groups are designed for teams to share information, files, and discussions.

Post action on the Account object allows users to discuss customer accounts directly from the Account record feed. Salesforce Chatter feeds appear on record pages and allow users to follow records and see updates about them.

Why others are incorrect:

Private Chatter groups are not suitable because CK wants all company employees to see the conversations.

Chatter actions to create tasks help assign work, but they do not primarily solve open company-wide collaboration around accounts.

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The correct answer is D. Component visibility filter.

In Lightning App Builder, component visibility rules can control whether a component appears based on context, including the device/form factor. Salesforce Trailhead specifically describes creating a visibility rule so a component appears only when the page is viewed on a phone, which matches restricting a Lightning component to mobile users.

A is incorrect because form factor settings are generally used for page/device availability or preview behavior, not the best feature for hiding or showing one specific component on a single Lightning record page.

B and C are incorrect because the Highlights Panel and Related List Quick Links are page components, not conditional visibility tools.

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The correct answer is A. Flow.

The requirement says the Opportunity should store the Account Billing State value, but the value must remain static after the Opportunity is created. A record-triggered Flow is the recommended declarative automation because it can run when an Opportunity is created and populate a custom field with the related Account’s Billing State. Salesforce Trailhead describes record-triggered flows as automation that can run when a record is created or updated, and can update the triggering record or related records depending on configuration.

D. Formula field is incorrect because formula fields are automatically calculated and read-only. A formula would continue to reflect the current Account Billing State, so it would not preserve the original value after creation.

B. Apex is not the recommended first choice because Flow handles this requirement declaratively.

C. Roll-up summary field is incorrect because roll-ups aggregate child records; they do not copy a parent Account field value onto an Opportunity.

The correct answer is B. Validation Rule.

DreamHouse Realty wants to prevent an Opportunity from entering the Qualified stage unless Expected_Close_Date__c is populated. A validation rule is the correct tool because Salesforce validation rules check whether record data meets specified criteria before the user can save the record.

A validation rule could check:

Stage = Qualified

AND

Expected_Close_Date__c is blank

If both are true, Salesforce blocks the save and displays an error message.

A. Page Layout can make a field visible or required on a layout, but it cannot conditionally require the field only when Stage equals Qualified.

C. Activity History is unrelated.

D. Record Type controls business processes and layouts but does not enforce this condition by itself.

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