Select the correct indirect form of the given sentence.
Karan said to us, "You should leave early for the airport so as to reach on time.

A

Karan told us that we would leave early for the airport so as to reach on time.

B

Karan told us that we had to leave early for the airport so as to reach on time.

C

Karan told us to have left early for the airport so as to reach on time.

D

Karan told us that we should leave early for the airport so as to reach on time.