I think A, because it is very long distance. Fast twitch would be good for short sprints, intermediate for medium distance, slow intermediate for runs about a mile long, and slow for the longest distances.
Well because it is the amount that the nutritional facts are given on, say you buy a box of donuts, and it says 80 calories that could be for a 2 donuts for 1 for the whole package but knowing the serving size you can base how much you eat etc
C is going to be the best answer to this question.
