Correct option is C. The box does not move with a small force
Friction opposes the relative motion between two surfaces in contact. It acts on both surfaces. When some children try to push a box on a rough floor box with a small force, the box does not move
because of friction acting in a direction
opposite to the push. This friction
force arises between two surfaces in contact. It balances the
pushing force and therefore the box does not
move.