Concept:A body moving with uniform velocity has zero acceleration, so the resultant (net) force acting on it must be Fnet=0.Explanation:Uniform velocity means the body moves in a straight line at constant speed.Newton's first law states that a body continues in its state of uniform motion unless a net external force acts on it.If the resultant force were greater than or less than friction, the body would accelerate.Only when all forces balance does the velocity remain unchanged.Thus, the condition is that the resultant force is equal to zero.Answer:The resultant force on the body is equal to zero, i.e., option C.