What necessary piece of information is missing that prevents solving the problem?

By paying $$1200$ cash and the balance in equal monthly payments, how many months would it take to pay for a car costing $$13,905?$

Choose the correct answer below.

A$.$ The amount of the equal monthly payments

B$.$ The number of months in a year

C$.$ The cost of the car

D$.$ The initial payment of $$1200$