Pls help i have like a zillion D's and F's i need to bring up. (40 points)

If you can maybe just do like 1. 2., 3., or something like that so i can understand better :).

Which of the following resulted from asoka's rule of the mauryan empire? a. the empire gained control over india's southern trade routes. b. an order of secret police was developed to spy on people. c.alexander the great's troops left india. d. india experienced political unrest for many years.