Dick was not a（ ）son, because he made his old father live alone.

Dick was not a（ ）son, because he made his old father live alone.
A、durable
B、dynamic
C、dutiful
D、​dubious
【正确答案】：C
【题目解析】：本题考查形容词词义辨析。durable：耐用的，持久的；dynamic：充满活力的，精力充沛的；dutiful：尽职的，顺从的；dubious：可疑的，不可信的。句意：迪克是一个不孝顺的儿子，因为他让他的老父亲独自一个人居住。故C选项符合题意。