Every fitness program should include a. at least 60 minutes of cardio activity. b. a warm-up, a primary conditioning period, and a cool-down. c. at least 15 minutes of vigorous activity. d. a longer warm-up period than cool-down period

I'd personally say B because a warmup will reduce injury, soreness, and get you ready. Then you have your exercise. Then the cooldown helps bring the heartrate down to near-normal and to get the blood circulating freely back to the heart. Stopping abruptly could result in fainting or place undue stress on the heart.

1. the answer is a parasite