Answer:
B.) an oversized ego
Explanation:
Based on the information provided within the question it can be said that this is an example of an oversized ego. An ego is an individual's sense of self-importance. When Tyrone got promoted his ego enlarged, and he now believes himself to be way more important than his peers and thus no longer listens to them, since he believes that he knows everything and that his peers no very little compared to him.