population is howmany, sample is a singular thing
B) <span>He tells him that he doesn’t mind killing another human</span>
When forming friendships, people find several forms of similarity to be attractive. According to research similarity in personalities is the strongest predictor of initial attraction. Some researchers have suggested that similarity causes attraction because people are more likely to associate with those who are similar to them in characteristics such as age, race, religion, social class, personality education, intelligence, and attitude.
C I am pretty sure but it might be wrong