Probably the last one. It's the least realistic way to make your body healthy. If you are going to do exercise and make yourself healthy, friends would be helpful in that process and exercising is definitely a good way to be healthy.
True because why would it not be a good way
D) Consume fewer sugars.
Diabetes is a malfunction in processing sugar!
Tracking your flexibility over time as you train. There are no requirements on how flexible you need to be and there is no correlation of your length of life or muscle strength with how flexible you are.