If graduate nurse says c. "I should avoid interactions with angry colleagues.", it indicates further instruction.
Anger is usually a consequence of fear of loss of control, powerlessness or frustration. Though the words of angry person do seem hurtful, they are a buildup of suppressions.
It is suitable to confront such person, which has two benefits. The suppressed emotions find an exit, lightining the mind and heart of person. They may have clear point of view after this. Confronting also provides an opportunity to clear the misunderstanding if any. However, remember to understand the point of view and do not invalidate their feelings.
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