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