Clearly it is with great _____ that he admitted his mistakes in

Clearly it is with great _____ that he admitted his mistakes in public.
A、reward
B、response
C、request
D、reluctance
【正确答案】：D
【题目解析】：考核单词含义，句子含义是很显然他是及其不愿在公共场合承认自己的错误。