To be honest they all are great choices but personally I would suggest answer C.
Hope this helps.
Answer:
The fourth one
Explanation:
The others are kinda non-sensical, he wanted revenge
An adjective is a word or phrase naming an attribute, added to or grammatically related to a noun to modify or describe it.<span>
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The correct answer is "until".
This is because her opinion changed when she found out what the school would be like. This is why we use until.