Native son question

On page 83, for what reason does the author choose to repeat the words "he" and "could" in the third sentence while also using dashes as punctuation?

A. Wright was stressing the importance of the plan Bigger was coming up with to hide his crime

B. Wright was showing that Bigger had a stuttering problem when he talks.

C. Wright was trying to slow down the way time was passing during the scene to make it more suspenseful

D. Wright was trying to show how nervous Bigger was in dealing with his mistake.