妊娠对肝功能的影响哪项是正确的

A．妊娠期肝脏血液循环量增加

B．妊娠期肝内糖原储备量减少

C．妊娠期血清碱性磷酸酶增高

D．妊娠晚期血清白蛋白升高

E．血清胆固醇下降

Teenagers ________ their sense of hearing because they always wear earphones.

A．damage

B．are damaging

C．has damaged

D．will damage