Correct Answer: D
Explanation:
By stating that fitness walking does not require
a commute to a health club, the author stresses
the convenience of this form of exercise. The
paragraph also states that fitness walking will
result in a good workout. Choice a is incorrect
because no comparison to weight lifting is
made. Choice b may seem like a logical answer,
but the paragraph only refers to people who are
fitness walkers, so for others, a health club
might be a good investment. Choice c is not in
the passage. Although choice e seems logical,
the paragraph does not indicate that the wrong
shoes will produce major injuries.