How should an administrator ensure the data is captured properly?

AW Computing created new multi-tier service plans. The primary difference between the packages Is the length of the term. The company wants to capture start and end dates for each service plan sold, which can direr from the contract dates of the subscription.

How should an administrator ensure the data is captured properly?
A . Build a validation rule on the Opportunity object to require custom date fields based on the product(s) selected.
B . Configure formula fields to reflect the close date of the opportunity.
C . Create a new price book for service plans with term lengths.
D . Make a validation rule on the Opportunity Product object to require custom date fields based on the product family.

Answer: B