There Is No Such Person as Frank Starling

There is no such person as Frank Starling. Contrary to popular belief, he never had his own law. Instead, in the late19th century, a man named Otto Frank performed research (with frogs) that was later extrapolated by Ernest Starling (with dogs) . Which of the following MOST adequately depicts the Frank-Starling mechanism?

A) A body at rest will stay at rest; a body in motion will stay in motion
B) The strength of ventricular contraction is increased when the ventricle is stretched prior to contraction
C) For every action, there is an opposite and equal reaction
D) The strength by which a nerve or muscle fiber responds to a stimulus is not dependent on the strength of the stimulus