Find the Appropriate Linear Cost or Revenue Function $\$ 50$ Plus $\$ 35$

Multiple Choice

Find the appropriate linear cost or revenue function.
-An electrician charges a fee of $\$ 50$ plus $\$ 35$ per hour. Let $C(x)$ be the cost in dollars of using the electrician for $x$ hours. Find the linear cost function.

A) $C(x) =50 x+35$
B) $C(x) =35 x-50$
C) $C(x) =50 x-35$
D) $C(x) =35 x+50$