One reason (not to say I've done it myself) is that it makes you feel good.
I think the person got some "fats" in there serving and havent burn it through exercising so its stored in the body as body fat which will make the person gain weight.
Answer:
c or b makes the most sense
Explanation:
bananas ripen and then go bad very quickly so they put unripe bananas into stores that way whenever you are ready to eat them they are ripe and not bad