Answer:
a. if they had a different opinion than ninety-five percent of the nation
Step-by-step explanation:
In order to know the answer, it is best to define what the word "outlier" means. Talking about people, an outlier is a person who is different from the normal population. The difference of that person is significant that it becomes strongly noticeable.
Among the choices above, it is only choice a which shows that a person is an outlier. The person mentioned here has a unique opinion than majority of the population. This makes him significantly different.