Friction: a Packing Crate Rests on a Horizontal Surface

Multiple Choice

Friction: A packing crate rests on a horizontal surface. It is acted on by three horizontal forces: 600 N to the left, 200 N to the right, and friction. The weight of the crate is 400 N. If the 600-N force is removed, the resultant force acting on the crate is

A) zero.
B) 200 N to the right.
C) 200 N to the left.
D) 400 N to the left.
E) impossible to determine from the information given.