I would go with the last choice
rest, ice, compress, elevate, stabilize
The glycemic index (GI) is a number associated with a specifix food that represents the food's effect on an individual's blood glucose level. The blood sugar should be kept constant so that the body can perform well. The glycemic index helps you track your blood sugar.
I think it should be B because to improve your'e physical fitness you have to do regular excercise