Select the most appropriate indirect form of the given sentence.
She said, "Deepak slipped when he was trying to skate."

A

She said that Deepak was slipping when he was trying to skate.

B

She said that Deepak slipped when he was trying to skate.

C

She said that Deepak had slipped when he was trying to skate.

D

She said that Deepak has slipped when he was trying to skate.