Answer:
Option B. The statement that includes a rebuttal is the following: Some argue that Douglass's objective tone makes his narrative boring: however, it actually helps reader to see more clearly the experiences he is describing.
Step-by-step explanation:
A rebuttal is defined as a refutation or contradiction, it means a statement that a claim or criticism is not true. In option B, the statement starts with a claim and the, with the use of the adverb however introduces the refutation of that claim, making the phrase a rebuttal.