Conclusions Drawn from Muscle Contraction Experiments Conducted by A

Conclusions drawn from muscle contraction experiments conducted by A.V. Hill demonstrated what about the process of science?

A) Scientific conclusions are tentative and always subject to revision.
B) Some experiments can prove hypotheses and some cannot.
C) All truly scientific conclusions are correct and should be accepted as being so.
D) Studying nonhuman animals is not useful for understanding human physiology.