The correct statement of the up holding and down pressing of “Third movement one hands to hold the sky while the other to press the earth so as to regulate spleen and stomach”is

A、When reaching the vertex, you should keep the finger tip of the upholding hand backward and the finger tip of down pressing hand forward.;
B、When you stretch your hands to the top, your arms will relax and fall back immediately.;
C、Two hands should reach the top at the same time.;
D、None of the above is true.