单选题
The author says that he is a naturalist rather than a scientist probably because he thinks he ______.
A、
has a great deal of trouble doing mental arithmetic
B、
comes up with solutions in a most natural way
C、
lacks some of the qualities required of a scientist
D、
just reads about other people’s observations and discoveries
【正确答案】
C
【答案解析】
[解析] 细节题。作者在最后一段指出one of the outstanding and essential qualities required is serf-discipline，a quality I lack，由此可知C为正确答案。
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