The correct answer to this open question is the following.
Although there are no options attached, we can say the following.
According to the authors of your text, it is primarily the emotional aspect of prejudiced attitudes that make them relatively impervious to rational or logical arguments.
Prejudice can be defined as an attitude. This attitude is based on concepts that cannot be true but through previous experiences, people kept one fixed idea about a person, place, or event.
The emotional factor is what makes prejudices relatively impervious to rational or logical arguments. People have belief systems so ingrained in their psyche that is very difficult for them to change. When they act in an emotional way it is very difficult for then to use logic or reason.