If berat saw coral in the stockroom. Coral is trying to influence coral making use of personal appeal.
Personal appeal is the ability of a person to influence others by using different type of emotions.
Based on the given scenario Coral is using personal appeal on berat after being caught by telling her "we’ve been friends since first grade" so as to prevent berat from saying a word concerning the event.
Therefore Coral is trying to influence coral making use of personal appeal.
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