Mark, Frank, and Henry Share an Off-Campus Apartment

Multiple Choice

Mark, Frank, and Henry share an off-campus apartment. When they first decide to live together, Henry sets up an account with the local cable company for television and internet service, which costs $150 each month. The roommates agree that each will pay one-third of the bill, or $50 each month. Two weeks into their third month together, Frank suddenly moves out, leaving Mark and Henry alone in the apartment. Now the bill from the cable company is due. How much is Henry legally obligated to pay the cable company for the monthly bill?

A) $50
B) $75
C) $100
D) $150