When You Drag a Toy Teddy Bear Along the Floor

When you drag a toy teddy bear along the floor by a force that is parallel to the floor, the magnitude of the force of friction

A) is independent of velocity or acceleration.
B) increases when the velocity increases.
C) is proportional to the acceleration.
D) decreases when the force parallel to the floor increases.
E) increases when the force parallel to the floor increases.