An individual picks up a cup and drinks from it. This is an example of __________. A. a concentric contraction because muscles cause the elbow joint and arm to move B. an eccentric contraction because the release of the muscle in the back of the arm causes the elbow to bend C. an isometric contraction because the cup was stationary until the hand picked it up D. a midcentric contraction because the movement took place around the core of the body