Reading Comprehension (RC) | Re: Determining whether a given population of animals constitutes a distin

Hi Experts,
In Q1. The passage is primarily concerned with

A.describing the development of the biological species concept
B.responding to a critique of reproductive compatibility as a criterion for defining a species
C.considering two different approaches to identifying biological species
D.pointing out the advantage of one method of distinguishing related species
E.identifying an obstacle to the classification of biological species

I am confused between B and C.While reading the passage,the
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