The Same Constant Force Is Used to Accelerate Two Carts $\sqrt{2}$

Multiple Choice

The same constant force is used to accelerate two carts of the same mass, initially at rest, on horizontal frictionless tracks. The force is applied to cart A for twice as long a time as it is applied to cart B. The work the force does on A is WA; that on B is WB. Which statement is correct?

A) WA = WB.
B) WA = $\sqrt{2}$ WB.
C) WA = 2 WB.
D) WA = 4 WB.
E) WB = 2 WA.