Which of the following best explains why the natural family planning method should be used by long-term couples only? a. this method is the least effective method of all birth controls. b. this method requires the couple to be prepared for a child. c. this method protects against numerous stis. d. this method is 100% effective if done correctly

The cardiovascular system, which transports blood through the body, is a one-way system. select the best answer from the choices provided. t f

Aperson who is overweight is to percent over his or her ideal body weight

How does drinking alcohol or using drugs put a person at risk for hiv infection? a.they improve judgment, which makes it more likely for people to engage in risky behavior. b.they impair judgment, which makes it more likely for people to engage in risky behavior. c.they impair judgment, which makes it less likely for people to engage in risky behavior. d.they improve judgment, which makes it less likely for people to engage in risky behavior.