A - may include physical intimacy
B- involves people who are related by marriage or adoption
Muscular strength is how much you can lift/push/pull, ect. Muscular endurance is how long you can do something with your muscles. Like if you have to put your are straight out in front of you and hold a 25 pound dumbbell. Your will get tired and give out. the more Muscular endurance you have the longer you can do something with your muscles.
It would not be answer C because a majority of supplements are not approved by the FDA. This does not make them anymore effective. The answer is D.
They will cheat the rest and won't get an accurate eye exam