math question of functions and gas and meaning of the statement

Question

When starting with a full tank of gas, the function Q(x) represents the number of gallons of gas left in a car after it has driven x miles.

What does the statement, Q(100) = 5, represent?

A.
After the car has driven 5 miles, it will have 100 gallons of gas remaining.

B.
The car can hold a maximum of 100 gallons of gas at a time.

C.
After the car has driven 100 miles, it will have 5 gallons of gas remaining.

D.
For every 100 miles the car drives, it loses 5 gallons of gas.

Answer 1

C is the answer, which ought to be clear after reading the statement defining what Q(x)means. 

You need to put your Thinking Cap on for word problems.