The word would be 'use' because it can be used both as a verb and noun but here is used as the noun. We can tell they want a noun since the word 'correct' is an adjective, which describes only nouns. It wouldn't be 'used' because it is a past tense of the verb.
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what do you need help with?
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Answer: Um I am so sorry i did not learn anything about this :(
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Answer:
A better government represents a quest for the betterment of mankind.
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hope this helps
"Not all cops are bad" is correct. The first example is misleading and would cause confusion in the reader