You are designing a SharePoint 2010 solution that allows users to enter address
information for contacts into a list named Address. You have the following requirements:
·Ensure that users enter full nine-digit zip codes for the address information. .Display a
custom message indicating that a zip code is invalid if the entered zip code does not match
the full nine-digit requirements. You need to ensure that the application is designed to meet
these requirements. Which approach should you recommend?

A.
Create a Datasheet view on the Address list

B.
Use the Form Options of the Address list.

C.
Create a formula on the column

D.
Create a custom command.