I believe the answer to your question will be D)
I think it might be B-memory problems but I’m not sure so if I’m wrong then sorry lol.
Cross country is a skiing muscular endurance because during the spring and the summertime start exercises of general muscular endurance (physical and gymnastic exercises) using a program of lower intensity without weights. Strength training is the kind of exercise that builds healthy muscle tissue. Strong muscles help you to move your body more efficiently, also become more coordinated and better able to perform technical movements.
Typical exercises could be: push-ups (1), bench dips (2), lunges (3), calf raise (4).
I hope i gave you a good understanding good luck!!