A Box Rests on a Frictionless Countertop

Multiple Choice

A box rests on a frictionless countertop. A boy pushes horizontally to the right on the box, and a girl pushes on it to the left, yet it remains stationary. Which of the following statements is false?

A) We know the force of the boy on the box is equal in magnitude to the force of the girl on the box, because the box is in equilibrium.
B) We know the weight and normal force are equal in magnitude because the box is in equilibrium.
C) We know the weight and normal force are equal in magnitude because of Newton's third law.
D) We know the force of the boy on the box is equal in magnitude to the force of the box on the boy, because of Newton's third law.