Read the definition. an idea that is downplayed or treated casually which literary device matches the definition? a. hyperbole b. paradox c. irony d. understatement

The answer is:  D. understatement.

An understatement is the display of something as minor, worse or less significant than it actually is. In this case, the idea is treated casually or downplayed, which means somebody makes it appear less important than it is.

The rest of the options are incorrect because a hyperbole is an exaggeration not meant to be taken literally; a paradox is a statement that sounds reasonable but its conclusion does not make sense or is contradictory, and an irony means the opposite of what is being said.

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answer: group ii. when the root is a full word except for a final e, the forms usually are spelled with -able.

explanation: the word will be deplorable. -able will be used with the word 'deplore-'. the group ii is when the root is a full word except for a final e, the forms usually are spelled with -able is used for the word deplore- because the word deplore- has 'e' at the end of it.