Although Some Legislation Makes the Job of Managing People More

Although some legislation makes the job of managing people more difficult for managers, what positive results have occurred?
1) Decreased bias against the older employee
2) Increased salaries for minorities
3) Increased opportunities for women
4) Increased opportunities for disabled

A) 2, 3, 4
B) 1, 2, 3
C) 1, 2, 4
D) 1, 3, 4