You Reach Down to Pick Up a Bucket Full of Water

You reach down to pick up a bucket full of water. When you begin your arm is straight and once you have lifted the bucket your arm is bent (forearm touching your bicep) . Picking up the bucket requires certain muscles to perform work. Which of the following BEST describes the action caused by the force of the muscle contraction?

A) The force of muscle contraction is transmitted throughout the endoskeleton.
B) The force of the muscle contraction flexes the elbow joint.
C) The force of the muscle contraction extends the shoulder joint.
D) The force of the muscle contraction depends on how far from the elbow joint the bicep attaches to the forearm.