When Can You Treat a Moving Object as If It

Multiple Choice

When can you treat a moving object as if it were a point-like particle?

A) Only if it really is a point-like particle.
B) You can always treat a moving object as if it were a point-like particle.
C) Only if the object is moving with constant acceleration.
D) Only if all parts of the object are moving in the same direction and at the same rate.
E) This question has no physical meaning.