As for between vs among discussion, there is no concrete rule. Check this from bartleby.com: It is often argued that between should be used to express a relationship involving two of something, and among should express relationships involving three or more, but in fact that generalization does not d...

OA IS WRONG.... corrrect answer should be C what is confusing here is sorting out the SUBJECT in such cases.... find the verb first (illustrates/illustrate here) and then ask what illustrates/illustrate??? the EPISODES ILLUSTRATE *if this doesnt sound convincing here's another way to rule out in the...