AP English Language

The sentence that does NOT function as a concluding sentence is: B.The second experiment yielded inconclusive results, raising the need for further investigation.

Here’s why:

This sentence introduces an unresolved issue and suggests the need for more research, which keeps the discussion open rather than closing it.

Why the other options work as concluding sentences:

A."To conclude, it is evident that exercise plays a significant role in maintaining a healthy ...