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.
I'm assuming we are talking about Henry Channon, he went into politics and he was associated with the appeasement wing of the Conservative party. Why did he want appeeasement, well here is what the ODNB said: "Always ferociously anti-communist, he was an early dupe of the Nazis because his attractive German princelings hoped that Hitler might be preparing for a Hohenzollern restoration." Hohenzollern was a house of former princes, kings and emperors. I am assuming that he thought that with his politics of appeasement he could achieve that.
Answer: They tried to ensure that all policy decisions are in the public interest since no intermediaries are placed between the voters and the public decisions.
Explanation:
<span>D. lacking limits or rules about who would be enslaved</span>