In this question, we are supposed to resolve the apparent discrepancy between two seemingly conflicting pieces of information:
(1) In the last ten years, there have been few complaints to law enforcement agencies of telemarketing fraud
(2) In the last ten years, telemarketing schemes have becoming more and more serious
So how can we show that these two things aren't necessarily conflicting?
* Well we could say that people who are the victims of fraud never even realized that they were victims at all. Imagine a situation in which someone donates to an organization over the phone (the organization being someone's pocket, of course) - can you ever really be fully aware of who you are donating too?
* Maybe people are not complaining in general? Or better yet, maybe they simply aren't complaining to law enforcement but instead a separate bureau that deals with this sort of thing.
* Maybe the crimes are being reduced in number but are still becoming more serious. The stimulus is just saying that telemarketing fraud is simply "more and more serious a problem" but doesn't explain what exactly "serious" means.
Now that I have a solid idea of how to resolve this discrepancy, I can proceed to the answer choices.
(A) This doesn't resolve anything. We don't care about what happens when telemarketers are convicted! We are trying to understand why complaints are low but the problems are increasing!
(B) This is actually very similar to (A). We aren't concerned about the justice inflicted upon telemarketers. We want to explain why complaints are low but the problems are increasing!
(C) This is close! This gets at one of the things I pre-phrased. If they cannot detect it then they obviously won't complain. However, (C) is actually saying that they do detect it, but they detect it too late! This could still mean that they will complain. This would be a much better answer (and potentially correct) if it said "Some fraudulent telemarketers have concocted...that makes it unlikely that victims will ever detach the fraud."
(D) This is similar to (A) as well. We don't care about the prosecution of telemarketers! We want to connect "complaints" with the seriousness of the problems.
(E) This looks good! and it better because its the last one left! If the majority (note how strong this word is) of victims do not seek any legal remedy (aka, don't complain), then maybe this could explain why there aren't very many complaints! Now it doesn't address the problems aspect but it doesn't really need to because, as another poster said, we can just accept that "fraudulent telemarketing schemes have become more and more serious"