You need to prevent users from changing their password using Outlook Web Access (OWA)

You have an Exchange Server 2010 organization.
You need to prevent users from changing their password using Outlook Web Access (OWA).
What should you do?

A.
Create a Group Policy Object.

B.
Create an OWA mailbox policy.

C.
Modify the authentication settings of the OWA virtual directory.

D.
Modify the authentication settings of the IISADMPWD virtual directory.