Thanks for the question. Notice that any correct answer here is going to somehow change the way we interpret the data or cast doubt on the data somehow, since this is the evidence for the author's argument.
(B) is incorrect because it actually strengthens the argument. (B) provides another documented source suggesting that there were high levels of interpersonal violence.
(C) is incorrect because it's not really relevant, since it doesn't change anything about how we view the data at all.
(D) is incorrect because it's also irrelevant, since the definition of "violent interpersonal crimes" explicitly excludes those committed during times of war.
(E) is incorrect because it's irrelevant, since we're told explicitly in the prompt that the number of people arrested increased by a percentage (as opposed to an increase in the percentage of people), so even if the total population went down, the total number of violent interpersonal crimes still went up. Hope this helps!
