Which of these is most likely to prevent pregnancy a. male withdrawal before ejaculation b. proper condom use c. tracking of female body temperature to identify ovulation times d. proper spermicide use

B. Proper condom use

i think it would be b the increase in body temp

the more fit you are, the faster the recovery. your heart rate drops most sharply in the first minute after you stop exercising; it should then fall about 20 beats a minute—a drop of less than 12 beats a minute is considered abnormal. this “recovery heart rate” is measured as part of an exercise stress test.