Which sentence has the most effective syntax?
a. chewing a ragged nail and checking her watch, she jiggled her leg up and down.
b. after checking her watch, she jiggled her leg up and down chewing her nail.
c. checking her watch, her leg jiggling up and down, she chewed a ragged nail.
d. her leg jiggling up and down, she chewed a ragged nail and checked her watch.

Read this passage: byron and mitch are co-captains of the mathletes, their high school's academic team. they are backstage with the five other team members, preparing to compete in the state math quiz. byron sits on the floor with his eyes closed and his earbuds in, listening to classical jazz, which him focus his mind and energy. suddenly, he feels a presence beside him. he opens his eyes to see mitch staring at him. "mathletes! mathletes! " mitch chants loudly. mitch gives byron a thumbs-up and then proceeds to strut around like a peacock, high-fiving the other team members, as byron shuts his eyes again and does his best to refocus his mind which statement best summarizes the passage?