What is a hero? Who are your students’ heroes? Have a discussion about fictional heroes in books, movies, television, and comics as well as real-life heroes. What qualities do most heroes share? Have them measure Nelson Mandela’s life against those qualities.

B

Explanation:

A. Changing the sentence structure isn't a good way to control the pacing of the story because keeping a constant structure helps keep the story well put together

C. Making the narrator reliable is irrelevant because he doesn't need any credibility

D. Making the character's dialogues "sound more realistic" is not a way to control the pace of the story. People talking has nothing to do with how the story flows