Which of the following is an example of moving properly for a push-up? (3 points) raising and lowering the body to a 90-degree angle at the elbow with a flat back raising and lowering the body to greater than a 90-degree angle at the elbow with a flat back raising and lowering the body to less than a 90-degree angle at the elbow with a flat back raising and lowering the body with the elbows locked out in the up position and a flat back