His argument was based on the assumption that the Brontosaurus’s five sacrum bones would have fused together into the Apatosaurus’s three sacrum bones with age. Should the writer make this addition?

Explanation:

The writer should consider adding the information.

The correct answer is

B. Yes, because the sentence provides commentary that helps develop the paragraph’s explanation on how the Brontosaurus came to be misclassified.

Looking at the sentence, we can discover that it actually provides commentary that helps in the development of the explanation.

It helps to develop the explanation of how Brontosaurus came to be misclassified.

This misclassification was due to Riggs's assumption and subsequent argument.

Thus, adding the sentence will enable the writer to further explain his argument on the misclassification of Brontosaurus.