The correct answer is B. By making own behaviour more balanced and fair.
A. Maintaining high self-esteem and egoistic behaviour is not an impartial behaviour. It is a biased behaviour that shows that the person is more concerned with their own self-interest than with the interests of others.
C. Assaulting a teacher is a criminal offence and is not an impartial behaviour. It is a violent and aggressive behaviour that shows that the person is not able to control their emotions and is not able to act in a fair and balanced manner.
D. Criticizing the teacher community is not an impartial behaviour. It is a biased behaviour that shows that the person is more concerned with criticizing others than with trying to understand and appreciate their perspective.
To demonstrate impartial behaviour, one should be able to listen to all sides of an issue and consider all perspectives before making a decision. One should also be able to control their emotions and act in a fair and balanced manner.