单选题 The department managers would need ______ flexibility in hiring temporary workers to deal with increased work load.
【正确答案】 D
【答案解析】[解析] 词汇：形容词
1．这是一道词汇题，选项均为形容词。
2．空格内应填入形容词修饰flexibility。D．additional(额外的)为正确选项。