Ok, I did not find my previous explanation convincing enough. I think this one may be better to refute C. I think the main goal of picking a plan is to find out which one will be more favorable
over the other and not which one will be more financially profitable
over the other. Here, the residents want to find the solution that will be best for each and every dweller and not trying to find a way to collect money from either plan.
Let's say that some dwellers are lazy and take advantage of the dumpsters to throw in their non-sorted trashes, this may make the "fine collectors" lose money over the individual bins method because they won't be able to determine who sorted the trash and who did not. Yet, does that solve the main problem
at hand? No. Whether or not they lose money will not determine which method will be better in terms of effectiveness because their motivation is not a financial one in the first place.
Another train of thought could be that the processing center has employees to sort out those unsorted trashes. Then the sorting of trashes may perhaps not be a main factor if only a small number of dwellers take advantage of dumpsters not to sort their trashes.
Anyways, I'm just trying to find ways to refute C but I think E has a more direct impact on the plan selection process