I believe the answer is A
The correct answer is 3
Stuart is walking past his bedroom door and accidentally slams his elbow into the door frame. The pain is sharp, immediate, and intense. The next morning his pain is a dull ache that bothers him throughout the day. The initial pain Stuart felt was caused by <u>fast</u> fibers, whereas the pain he felt the next morning was caused by <u>slow</u> fibers.
Answer: The purpose of the index is to give the reader an informative, balanced portrait of what is in the book and a concise, useful guide to all pertinent facts in the book. These facts, in the form of an alphabetically ordered list of main entries and subentries, will include both proper names and subjects.
<h2><em>4</em><em> </em><em>programas </em><em>de </em><em>ejercicio</em><em>.</em></h2>