Answer:
D
Explanation:
Feeling excessively sad or low. Confused thinking or problems concentrating and learning. Extreme mood changes, including uncontrollable “highs” or feelings of euphoria. Prolonged or strong feelings of irritability or anger. - nami.org
these would all cause sudden changes in behaviour
I have already read dictionary entry
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Answer:you will need to let it go .
We're going to the show!
hope this helps have an amazing day :)