Each one of us, ________ old or young, is a valuable member of s

Each one of us, ________ old or young, is a valuable member of society.
A、however
B、whenever
C、whoever
D、no matter
【正确答案】：A
【题目解析】：whatever=no matter whatwhatever在句子中作宾语，如whatever you want 无论你想要什么。however在句子中作状语，如however young or old 无论年轻还是年老。