A Block Is at Rest on Frictionless Incline That Makes $\theta$

Multiple Choice

A block is at rest on frictionless incline that makes an angle, $\theta$ , with the horizontal. The frictional force on the block is proportional to

A) sin $\theta$
B) cos $\theta$
C) tan $\theta$
D) Hold it! This force is independent of $\theta$