Answer:
c
Explanation:
marathon runners tend to have more slow-twitch muscle fibers, while sprinters will have more fast-twitch muscle fibers which allow faster movment but does not last as long while marathon runners have more paced and can last a long time.
B. Lactic acid build up creates pains and aches on the muscles
answer is : from cancer.
because that is the answer that could possibly be related to health . and that's the most rational one too.
