C. a memory aid
A mnemonic is a memory aid, usually a phrase or visual, that helps you remember a fact.
The detail that is essential to Churchill’s argument that countries should not remain neutral in the war is: A. “French and British Armies might well at the outset have saved not only Belgium but perhaps even Poland” since Churchill stated that the French and British saved Belgium during WW2 after it was attacked.
In my opinion, the best option is A. <span>Greed can be the undoing of a person, leading him or her to ruin. Macbeth's ruin was triggered by greed. He had a choice: to believe or not to believe the weird sisters' prophecy. He believed them and acted upon it because he wanted more power and, ultimately, the crown.</span>
