If Amisha works hard, then either Santosh or Ravi will enjoy themselves. If Santosh enjoys himself, then Amisha will not work hard. If Devika enjoys herself, then Ravi will not enjoy himself. Therefore, if Amisha works hard then which of the following statements follows ?

A

Ravi will not enjoy himself.

B

Santosh will enjoy himself.

C

Devika will enjoy herself.

D

Devika will not enjoy herself.