a reviewer is required to enter a reason in the comments field only when a candidate is recommended to be hired. which action can a developer take to enforce this requirement?

Create a validation rule

Explanation:

Solution

The action a developer would take to enforce this requirement is by creating a validation rule.

Validation rule: A validation rules demonstrate that the data a user enters in a record meets the standards you identify before the user can save the record.

A validation rule can have a formula or expression that assesses the data in more than one fields and returns a value of either "True" or "False".

It allow for values which are or are not allowed on a specific field.