脑出血与蛛网膜下腔出血之鉴别下述哪点最重要

A．活动中发病
B．头痛、呕吐
C．脑脊液含血量多少
D．CT见脑突质内高密度灶
E．脑膜刺激征

Supposing you can't write, what would you do

A．may not

B．couldn't

C．are unable

D．wouldn't