BD is correct Answer C and A is incorrect: Roll-up summary fields can use the COUNT, SUM, MIN, and MAX functions not AVG

BD is correct Answer C and D is incorrect: Roll-up summary fields can use the COUNT, SUM, MIN, and MAX functions not AVG

Answer is BD. C is incorrect as there is no AVG option for roll up summary fields. https://www.salesforceben.com/create-roll-up-summary-fields-using-salesforce-flow/

converting the Master detail relationship to Lookup will not impact the roll-up summary fields. And the Saving of the roll-up fields happen asynchronously and not instantaneously (definitely not prior)

https://help.salesforce.com/s/articleView?id=sf.fields_about_roll_up_summary_fields.htm&type=5

Look up roll up summary fields and you’ll see the answer is b,d.

The correct options are A and C.

AW Computing uses a custom Invoice object to track invoices related to accounts. The administrator wants to use roll-up summary fields to view high-level information at a glance on the account record. Which two considerations should an administrator remember about roll-up summary fields? (Choose two.) A. Roll-up fields are calculated prior to save. B. Roll-up summary fields are created on the master side of a master-detail relationship. C. Roll-up types include COUNT, SUM, and AVG. D. Roll-up summary fields prevent the conversion of a master-detail relationship to a lookup.