A Force of Variable Magnitude Acting on a Toy Car

Multiple Choice

A force of variable magnitude acting on a toy car is represented in a F vs. x graph. The work done by this force on the toy car is

A) the value of F multiplied by the value of x at a certain instant.
B) the area bounded by the curve and the F axis.
C) the slope of the curve.
D) the area bounded by the curve and the x axis.
E) the value of F divided by the value of x at a certain instant.