单选题 Please give his decision plenty of ______ before you accept it.

【正确答案】 C
【答案解析】[考点] 固定搭配
[解析] give sb. an idea of“使(某人)明白”，为习惯短语。类似短语form an idea of“产生……的想法”；give up the idea of“放弃……的念头”。