What are two considerations an app builder should evaluate?

Cloud Kicks received a new requirement to calculate summaries from child objects of a standard object. The team would prefer to solve this declaratively.

What are two considerations an app builder should evaluate? Choose 2 answers
A . An app builder is unable to change a look up to a master-detail relationship.
B . An object can have up to two master-detail relationships.
C . A trigger on save or update can kick off calculations.
D . A value is required in all records of the lookup field prior to converting to a master-detail relationship.

Answer: A, D

Explanation:

To calculate summaries from child objects of a standard object, an app builder should evaluate two considerations:

An app builder is unable to change a look up to a master-detail relationship. A lookup relationship can only be converted to a master-detail relationship if the lookup field in all records contains a value. If some records have null values, then the conversion will fail.

A value is required in all records of the lookup field prior to converting to a master-detail relationship. As mentioned above, a lookup field cannot have any null values before it can be converted to a master-detail relationship. Users will need to populate the lookup field with valid values for all records before attempting the conversion.