A mechanic is trying to loosen the bolts holding a hubcap on a car and has a choice of two wrenches: one that is 25 cm long and one that is 50 cm long. Which of the following correctly explains which one she should choose and why?

She should choose the shorter wrench because torque increases for a smaller lever arm.

She should choose the longer wrench because torque increases for a larger lever arm.

She could choose either wrench since torque does not depend on lever arm.