Which choice most logically completes the text?

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A group of primate conservationists recently began a long-term study of the effects of different conservation strategies on the Perrier's sifaka (Propithecus perrieri). The species population is currently estimated to be around 500. It is challenging to accurately count these primates, however, which makes it difficult to tell whether the population is increasing, decreasing, or staying stable. The study may thus

risk making inaccurate conclusions about the effectiveness of different conservation strategies.

cause other conservationists to adopt a new methodology for counting populations.

benefit from including species beyond the Perrier's sifaka.

fail to consider less well-known conservation approaches for the Perrier's sifaka.