Select the correct indirect form of the given sentence.
Mother said to Kavya, "Switch off the light before you go to sleep."

A

Mother told Kavya to switch off the light before you go to sleep.

B

Mother told Kavya to switch off the light before she is going to sleep.

C

Mother told Kavya to switch off the light before she goes to sleep.

D

Mother told Kavya to switch off the light before she went to sleep.