镍氢电池是近年开发出来的可充电电池，它可以取代会产生污染的镍镉蓄电池。镍氢电池的总反应式是：H₂+2NiO(OH) = 2Ni(OH)₂。根据此反应式判断，下列叙述正确的是 [ ]

A．电池放电时，镍元素被氧化

B．电池放电时，氢是负极反应物，被氧化

C．电池放电时，电子流入H₂极

D．电池放电时，氢是正极反应物，被还原

Eventually, the President had to leave office _____ public pressure in order to ease the

tension of the situation. [ ]

A. in favor of

B. in response to

C. in return for

D. in honor of