Kannan said to Subha, "I'll return the book after I have read it."

• A. annan told Subha that he will return the book after he has read it.
• B. annan told Subha that he would return the book after he has read it.
• C. annan told Subha that he will return the book after he read it.
• D. annan told Subha that he would return the book after he had read it.