Question

multiple - choice question
how many animals are used for research each year in the united states?

100,000,000

<100,000,000
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Explanation:

Estimates suggest that the number of animals used in research each year in the US is well - below 100,000,000. While the exact number can vary based on different types of research, it is not in the hundreds of millions range.

Answer:

<100,000,000