Tech A says that when unloading a suspension where the coil spring or torsion bar is pushing against the lower control arm, a wood block must be placed between the upper control arm and the frame. Tech B says when unloading a MacPherson strut suspension with only a lower control arm, raise the vehicle by the frame , and allow the suspension to hang free. Who is correct? Select one: a. Tech A b. Tech B c. Both A and B d. Neither A nor B

c. Both A and B<br /><br />Both Tech A and Tech B are correct in their respective procedures for unloading a suspension system. Tech A's method of placing a wood block between the upper control arm and the frame when unloading a suspension with a coil spring or torsion bar is a common practice to prevent the spring or bar from coming into contact with the frame or other components. Tech B's method of raising the vehicle by the frame and allowing the suspension to hang free is also a correct procedure for unloading a MacPherson strut suspension with only a lower control arm.