A Fire Fighter Tightens the Nut on the Top of a Fire

Multiple Choice

A fire fighter tightens the nut on the top of a fire hydrant using a large wrench.If she applies a force of 250N perpendicular to the wrench,at a point 0.75m from the axis of rotation of the nut,how much work does she do on the nut as she rotates it through 45 $^{\circ}$ ?

A) 190 J
B) 150 J
C) 290 J
D) 130 J