Increase in military strength => increase in aggressive behavior => higher involvement in wars/
To strengthen this argument, we need evidence that directly supports a causal link between increased military strength and higher war involvement.
(A) The data doesn’t distinguish between the countries that were consistently involved in war and the countries that were involved in more wars during the beginning and end of the 30-year period.This choice provides additional detail about the data's structure, but it does not support the causal relationship between increased military strength and war involvement. It neither strengthens nor weakens the argument. Incorrect
(B) Some countries cited in the data were rarely involved in any war.This statement is irrelevant to the argument’s causal claim. The fact that some countries were rarely involved in wars doesn’t impact the argument about countries with increasing military strength being more likely to engage in war. If anything this rather weakens the argument as the countries cited in the data had less propensity of being involved in a war. Eliminate B.
(C) Data shows that none of the countries that had zero increase in military strength showed any increase in their involvement in wars.This option strongly supports the argument. If countries with no increase in military strength also showed no increase in war involvement, this supports the idea that military buildup is linked to a higher propensity for war. It implies that without a military increase, the tendency to engage in war does not rise, reinforcing the argument’s causation claim. Correct
(D) Situations that trigger an increase in military strength such as political tensions with neighboring countries are also likely to increase a country’s propensity to become involved in wars.This choice suggests an alternative explanation, where political tensions (not military strength) might be the cause of increased war involvement. This weakens the argument by introducing a factor that could account for both the increase in military strength and the likelihood of war, implying that military strength itself may not be the direct cause. Incorrect
(E) Data related to some of these countries is available only for a partial duration out of the 30-year period.This choice suggests a limitation in the data but does not address the argument’s causal link. Partial data for some countries neither supports nor undermines the proposed connection between military strength and war involvement. Incorrect