Choose the most appropriate option to change the narration (direct / indirect) of the given sentence.
“Don’t overspeed at night,” I said to Irina.

A

I warned Irina not to overspeed at night.

B

Over speeding at night is not good, I said to Irina.

C

I warn to Irina not to overspeed at night.

D

I had been warning Irina not to overspeed at night.