“You can’t bathe in this sea,” he said to me, “it’s very rough.”

A. He said that I can’t bathe in this sea because it’s very rough.
B. He said that you couldn’t bathe in the sea if it was very rough.
C. He said that I couldn’t bathe in that sea as it was very rough.
D. He said that you can’t bathe in this sea since it was very rough.