Muscular strength is how much force one muscle can give in one single max effort.
Try to incorporate all of these at the same time. I think that would be a good mix for all of your students. It also depends on what age your students are. If they are younger they may not be able to understand things that are too hard, so don't be too hard on them either.
Sterilization is a method of permanent birth control.
C because many people get addicted to alcohol and become alcoholics