Which factor influencing flexibility is dependent upon individual behaviors

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

The only infectious disease that was a top-ten killer of americans in 1900 that is still a top-ten killer in 1990 is hiv/aids select one: true false

To increase the amount of fibers in a muscle, you need to exercise at low intensity for increasingly longer periods of time.