Answer:
a. The headmaster displayed a competing style of conflict by being assertive and pushing his ideas or solutions to problems on others regardless of what others think.
Step-by-step explanation:
In competing style of conflict, an individual asserts his/her own opinions or needs on other and exercise cohesive power over the other with low regards for future relationships, it is an aggressive style of communication. The Headmaster did not consider the opinion of the physical education teacher, the Headmaster was assertive and pushed his idea on others, this is an example of competing style of conflict.