Choose the One Alternative That Best Completes the Statement or Answers

Multiple Choice

Choose the one alternative that best completes the statement or answers the question.
Solve the problem.
-A train ride is $\$ 3.40$ per ride. Write a model for the cost $C$ (in $\$$ ) for $x$ rides on the train.

A) $C = 3.40 x$
B) $C = 3.40 - x$
C) $C x = 3.40$
D) $C = 3.40 + x$