单选题 ______ touching in O"Henry"s stories is the gallantry with which ordinary people struggle to maintain their dignity.
【正确答案】 D
【答案解析】[解析] 名词性从句。句子的主语不完整,只有选项D能与后面的touching in O"Henry"s stories构成名词性从句作主语,其他的均不正确。故答案为D。