Because joshua was bullied by taller people his entire life, he believes that all tall people are mean and violent. joshua’s experiences have caused him to create a(n) of all tall people. a. respect b. stereotype c. characteristic d. open-minded opinion

So what Joshua believes now is that all tall people have certain characteristic (that they are mean and violent)- this would refer to all tall people, and it's not true: some tall people might be violent, but definitely not all of them, also some tall people might be mean, but not all of them.

Such false generalization is called stereotype - the answer is B.