– _____ do you think of studying abroad, Lingling?

– Well, it all depends! I prefer studying at home.

A．Where

B．When

C．Why

D．What

妊娠期妇女的情绪状态会对儿童心理健康产生影响，主要通过（）起作用。先天素质是遗传基因和胎儿发育过程中环境因素之间复杂相互作用的结果。