Nationalism was a leading cause of two world wars, (MAIN= Militarism, Alliances, Imperialism, Nationalism)
Nationalism led to occurrences such as totalitarianism, discoveries in military tactic, etc.
The answer that best describes the rhetorical strategy that Henry uses here is D. rhetorical question. Rhetorical questions are those that do not necessarily demand an answer - the answer is either obvious so it doesn't have to be stated, or there is no reason to say it.
However, if you need more than one option, I'd also choose interrogative statement, given that this strategy involves the use of questions, which fall under the category of interrogative sentences.
C. Denial of the right for Congress to levy taxes
Hope this helps! :)
I think I'd the answer is d