A. 未经自由液面修正的GM应满足GM T = 9s≥GM≥GM c

B. 经自由液面修正的GM应满足GM T = 9s≥GM≥GM c

C. 经自由液面修正的GM应满足GM T = 9s≤GM≤GM c

D. 未经自由液面修正的GM应满足GM T = 9s≤GM≤GM c