The primary type of evidence the author uses to support the claim that koala populations are inching toward extinction is A. quotations. B. statistics. C. descriptions. D. anecdotes.

Option B

Explanation:

Generally statistics is the most reliable form of data that can be mostly relied on, because the tools and analysis used in statistics are almost accurate. Any author would always bank on correct facts and data, the mostly reliable data that can used is the statistical data that has been analyzed. Due to the methodology of statistical data, authors always uses the statistical data has reference this is why option b is the right answer.