Columnist: The advent of television helps to explain why the growth in homicide rates in urban areas began significantly earlier than the growth in homicide rates in rural areas.
Conclusion
The invention of TV helps explain why homicide rates in urban areas grew before that in rural areas.
Evidence
TV sets became popular in urban homes about five years before they did in rural homes. And homicide rates started increasing in urban areas about four years earlier than in rural areas.
Evaluate
The author is looking at a Curious Comparison (why did homicide rates go up in urban areas four years before they went up in rural areas?) and then the conclusion is making a Causal claim (the advent of TV helps to explain the growth of homicide rates).
We evaluate this type of argument two ways: - Alternate Explanations for the curious fact? - plausibility of the Author's Explanation?
Why else might urban homicide rates have spiked four years earlier than rural homicide rates?
Maybe urban areas got more guns first. Maybe they had economic anxieties first. Maybe they had problems with drug-related violence first.
How plausible is the author's story?
I don't know, what does TV have to do with committing homicide? Were people seeing violence glorified on TV? Were they jealous of their neighbors who could afford a TV before they could?
Also, we were told the date of when homicide rates went up (1958), but not the date of the advent of TV. If that latter date is really far removed from 1958, then it's harder to believe that TV and homicide rates are connected.
Goal
Since this is Strengthen, we'll need an answer choice to either - rule out an alternate explanation for why homicide rates went up in urban areas a few years before doing so in rural areas. or - add plausibility to the Author's explanation that the advent of TV is responsible.