The sales manager was so adamant about her idea that it was out of the question for any one to talk her out of it.
【正确答案】
C
【答案解析】本句说销售经理固执己见，任何人想让她放弃意见都是不可能的。选项firm“坚硬的，坚定的”符合句意，如：The teacher was firm and did not change her mind．(老师很坚决，她不改变主意。)adaptable“能适应的，可修改的”，anxious“焦急的”，ta．1kative“多话的”都不正确。