It is the whim of a millionaire.

It is the whim of a millionaire.
A、It is an interesting idea of a millionaire.
B、It is a wonderful idea of a millionaire.
C、It is a mysterious idea of a millionaire.
D、It is a sudden and unreasonable idea of a millionaire.
【正确答案】：D
【题目解析】：根据选项可知此题的关键在于理解whim的含义。whim指"一时的兴致，心血来潮”，选项D中的sudden and unreasonable idea正有此意。而选项A中的interesting指"有趣的，有意思的”，选项B中的wonderful指“有趣的，美妙的”，选项C中的mysterious指“充满迷幻的，神奇的”。因此，只有选项D符合题意。答案为D。