Each member of a group of 6 people is either a knight, who always tells the truth, or a knave, who always lies.

7. Each member of a group of 6 people is either a knight, who always tells the truth, or a knave, who always lies. The first person says, "There is at least one knave in this group," and the nth person (2 ≤ n ≤ 6) says that there are at least n knaves in the group. How many knaves are there? A. 1 B. 2 C. 3 D. 4 E. 5