To Improve Upper Extremity Strength, Stability, and Proprioception, During Which

To improve upper extremity strength, stability, and proprioception, during which of the following variations of push-ups does body weight provide the greatest resistance?

A) Bilateral wall push-ups while in a standing position and leaning into and pushing away from the wall
B) Bilateral push-ups in a prone position, head down on an incline board with weight on hands and knees
C) Bilateral push-ups while standing and leaning on the hands on a kitchen countertop
D) Bilateral push-ups in a prone position with weight on the hands and knees