15. A force F is exerted by a broom handle on the head of the broom, which has a mass m . The handle is at an angle θ to the horizontal, as shown above. The work done by the force on the head of the broom as it moves a distance d across a horizontal floor is
(A) Fd sinθ
(B) Fd cosθ
(C) Fmcosθ
(D) Fm tanθ
(E) Fmd sinθ