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Allusion
Allusion is a figure of speech, in which an object or circumstance from unrelated context is referred to covertly or indirectly
There is a novel named Of Beetles and Angels by Mawi Asgedom, and his book was an extraordinary adventure from a refugee camp TO HARVARD.
His book teaches us that even if you're at the lowest point in life, try and you can get what you want.
You're right, it's D. Respect must be earned.