单项选择题

A.未经自由液面修正的GM应满足GMt=9s≤GM≤GMC
B.经自由液面修正的GM应满足GMt=9s≥GM≥GMC
C.未经自由液面修正的GM应满足GMt=9s≥GM≥GMC
D.经自由液面修正的GM应满足GMt=9s≤GM≤GMC