A Study of First-Year Law Students Found That the Students

A study of first-year law students found that the students who had an optimistic outlook:

A) were least likely to rank in the top 10 percent of their class.
B) had stronger immune systems than the students with a pessimistic outlook.
C) were just as likely to develop colds and respiratory infections as pessimistic students.
D) were less likely to persevere in their efforts to overcome obstacles and challenges than those with a pessimistic outlook.