Which would create a fast pace?

A. Formal diction

B. Lengthy sentence

C. Repeated sentence structure

D. Short sentences

D, short sentences. short sentences are often used to speed up the pace of prose because you read short sentences quickly. when you're in a panicked situation, you usually think in brief thoughts that overlap and cause a sense of chaos in your mind; short sentences in prose have a similar effect.

I think it's D. Short sentences