The water pockets located on the underside of inflatable liferafts（）.

A.stow rainwater; these 4 spaces do not take up valuable space

B.act as stabilizers by filling with sea water as soon as the raft is inflated and upright

C.hold the freshwater required by regulation to be provided in the raft when packed

D.None of the above

男性患者，30岁，车祸致头部受伤，立即昏迷，3h后入院，患者仍处于昏迷状态，刺痛睁眼，肢体屈曲，语句不清，不能回答问题，呕吐两次，呈喷射状，眼底检查视神经盘水肿，血压升高，脉搏缓慢有力，呼吸深慢。

最初的诊断是（）

A.颅内压增高

B.脑震荡

C.蛛网膜下腔出血

D.脑出血

E.脑挫裂伤