Highly intelligent people than those who are less intelligent. a) live longer
b) use more illegal drugs
c) are better looking
d) exhibit more social deficits

Answer is D, exhibit more social deficits correlation between intelligence and social difficulties. While actual mental deficiency quite clearly interferes with social function, and there is little debate about how that comes about, this article specifically intends to discuss the linkage between high intelligence and social isolation.

They need to know because sometimes they have a symptom

Dang it i was gonna answer but yeah its c