Hey there!
First, make sure you know what an abstract noun is.
Abstract Noun-<span>a noun denoting an idea, quality, or state rather than a concrete object.
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In this case, the answer is D(Logic is easily understood)
Missouri should be capitalized because it is a state
Hi i think the answer is B. i am sorry if it is wrong.
I would say understatement, i guess it could be sarcastic, but I've never learned sarcasm as figuritive language, if it was my question I would say understatement.