When he left school, the textbooks were put aside by him and were never reopened.

• A. After he left school, he put aside his textbooks and they were never reopened.
• B. He put aside his textbooks when he left school and never reopened them.
• C. He put aside his textbooks when he left school and were never reopened by him.
• D. He put aside his textbooks as he left school and never reopened.