单选题 It can be inferred from the passage that many zoologists assume that a large diversity among species of a given class of organisms typically leads to which of the following?

A、 Difficulty in classification.
B、 A discontinuous fossil record.
C、 A greater chance of survival over time.
D、 Numerical abundance.

【正确答案】 C

【答案解析】由第二段可知，最近研究表明，相对于物种的种类而言，生物对环境变化的适应能力更能使其在竞争中优胜劣汰，从而生存下来。所以由此推知，以往人们认为物种的多少对于生物的存活至关重要，故选C。