When a Certain Rubber Band Is Stretched a Distance X

Multiple Choice

When a certain rubber band is stretched a distance x, it exerts a restoring force of magnitude F = Ax, where A is a constant.The work done by a person in stretching this rubber band from x = 0 to x = L is:

A) AL²
B) AL
C) A + 2L²
D) A/L
E) AL²/2