Select the option that expresses the given sentence in reported speech.
The old man said, “I was walking in my garden at six o’clock.”

A

The old man said that I had been walking in my garden at six o’clock.

B

The old man said that he had been walking in his garden at six o’clock.

C

The old man said that I was been walking in my garden at six o’clock.

D

The old man said that he was walking in his garden at six o’clock.