I had problems eliminating (D) so I am going to run through my explanation here.
TV
became popular 5 years earlier in urban households
+
Urban homicide
began increasing about 4 years earlier than the similar increase in rural
→
The arrival of television
caused the earlier growth in homicide rates among urban communities (vs. the later growth rates among rural communities)
This is typical. Correlation/causation issues are best solved by doing a few things:
(1) Show that same cause produced the same effect in an analogous situation
(2) Show that the absence of the cause produced the absence of the effect
(3) Show that the effect didn't actually cause the cause
(4) Rule out an alternate explanation
With this in mind, we can go to the answer choices knowing that one of these 4 options is probably going to pop up.
(A) We have no idea about where the number of violent television programs are low. Maybe urban communities have very little violent television programs (remember that we are talking about an INCREASE not exactly an absolute NUMBER of homicides).
(B) This shows us option #3 of the strengthening a causation claim. It says that violence on TV
caused violence in society. Thus, (violence on TV → violence in society). This really helps us to strengthen the correlation/causation issue because it shows that TV → violence rather than violence → TV.
(C) We don't know when the "early years" of television were, first of all. We may presume that the advent of television coincide with the advent of television in urban communities. Yet even if we assume this, this actually weakens the causal claim just a bit by showing that there weren't even any violent television programs in those years! If there were no violent television programs, we
may conclude (though its definitely not necessary) that TV didn't cause violence. In other words, this actually destabilizes our causal conclusion if even just a little bit.
(D) This is the one I had problems with. Looking back though, I simply forgot my task. The argument is NOT saying that there was a
bigger increase in urban homicide or that there were
more urban homicides after television. The argument IS saying that TV helps to explain why urban homicide rates began increasing EARLIER than. Both urban and rural had about the same increase. Thus, we are not talking about how "profound" the effect was. We are talking about how early/late the effect was. We want to know about
temporal aspects, not the
magnitude of TV's effect.
However, I think this would be a correct answer if it said "The earlier that a person is exposed to violence on television, the earlier the effect that said violence has on that person." Let me know if you agree/disagree with this.
(E) What is the connection between leisure time and television-watching? We don't know!
This question very rigidly goes along with the basic way to strengthen a correlation/causation issue. The problem is that the answer choices are very intricate and attention to detail is crucial.