You need to ensure that users can update only the phone numbers and email addresses by using this view

You have three tables that contain data for dentists, psychiatrists, and physicians. You
create a view that is used to look up their email addresses and phone numbers.
The view has the following definition:

You need to ensure that users can update only the phone numbers and email addresses by
using this view.
What should you do?

A.
Alter the view. Use the EXPAND VIEWS query hint along with each SELECT statement.

B.
Create an INSTEAD OF UPDATE trigger on the view.

C.
Drop the view. Re-create the view by using the SCHEMABINDING clause, and then
create an index on the view.

D.
Create an AFTER UPDATE trigger on the view.

Explanation:
Reference:
http://msdn.microsoft.com/en-us/library/ms187956.aspx