This question is a little tricky. I’ve checked several sources and they do not agree. Some sources say that between should only be used with two things. Other sources give complex and confusing explanations.
If you are taking a test, the only thing that matters is what the test-giver thinks the answer is. The test-giver might not agree with me if they use a rigid rule that only considers how many things there are.
I like the way my own grammar book explains it. It starts with the traditional distinction of two vs more than two. Then it says:
“…the matter is in fact a little more complicated.”
“Among is used in statements involving three or more persons or things when not every single person or thing is interacting with every other person or thing in the group: The principal tried to encourage discussion among the students in her school.”
“Between is used in statements involving only two persons or things, but it is also used in statements involving three or more persons or things when every single person or thing is interacting with every other person or ting in the group: She divides her time between New York, Paris, and Prague. In other words, if all members of the group interrelate either literally or figuratively on a one-on-one basis, between is the appropriate preposition.”
“NearlyNapping told that between is used for comparison even for more than two things but among is used when there is no comparison.”
In the context of the original question it is a comparison since it’s asking about the differences. But it doesn’t have to be a comparison.
Also it should be NearlyNapping said that….
Using told instead of said is a common mistake for ESL people.