What could be the issue?

AW Computers has enabled the feature for Contact to multiple Accounts. A rep is trying to remove the primary Account from a Contact but Is unable to do so. The administrator has already updated the page layout to no longer require an Account.

What could be the issue?
A . A primary Account relationship Is required on a Contact regardless of the page layout settings.
B . The Contact has Indirect relationships to other Accounts.
C . The Account Contact relationship record needs to be deleted first In order to disassociate Contact from the Account.
D . Private Contacts need to be enabled in Setup.

Answer: A