Although Alexander is careful to treat all of his employees fairly, he secretly feels that those who graduated from his business school are more competent employees than those who graduated from rival schools. This illustrates:

Answer:Prejudice

Explanation:

Prejudice is strong negative attitude or stereotype that one has about a particular group of people that is usually unreasonable or baseless but only driven by the fact that those people don't belong in the same group as this person. This is a prejudgement that makes a person group everyone together as the same in that particular group without even giving them a chance to prove themselves.

It could be because they are from a diffrent race, socio-economic status, different class, different backgrounds etc.