The correct answer among the options given is the last one. Birth control sponge is a barrier method of contraception. This type of contraception is known to be 88% effective or in every 100 women who use this method, 12 of them will become pregnant in a year.
Answer: (at least) 1 hour per day
Explanation/Calculation: Teens from ages 13-18 bodies are need lots of physical activities so that their body and brain will be ready for adulthood where your body and brain slows down. If you get lots of exercise in your teen years, it's very likely your health in adulthood will be healthy too.