The Auditor Determines That Matthews Company Occupies the 3rd Floor

The auditor determines that Matthews Company occupies the 3rd floor of an office tower for which it pays no rent. The most likely explanation is

A) they got lucky the landlord hasn't noticed the lack of payments.
B) the landlord has weak internal controls over billings.
C) a related party transaction in which a major shareholder owns the office tower.
D) Matthews Company is engaging in fraudulent activities.