A 5 N force pushes on the right side of a box. At the same time, a 10 N force pushes on the left side of the box. What happens to the box? A. It is moved to the right by a net force of 5 N. B. It is moved to the right by the 10 N force. C. The forces pushing on both sides cause it to remain at rest. D. It is moved to the right by a combined force of 15 N.