An inflation life raft is thrown into the water from a sinking vessel, what occurs automatically after the painter trips the C0₂ bottles to inflate the raft?（）.

A.The sea anchor deploys

B.The floor inflates

C.If upside down, the craft rights itself

D.The painter detaches from the raft

人体的特异性免疫包括细胞免疫和体液免疫，下列仅属于体液免疫功能的是（）

A.裂解病毒感染的细胞

B.合成抗体抑制病菌繁殖

C.分泌淋巴因子以增强免疫效应

D.分泌溶菌酶杀灭病原体