Change into indirect. Choose the correct alternative. He said. "How do you manage to finish your work always in time?

• A. He inquired how I managed to finish my work always in time.
• B. He asked me how did I managed to finish my work always in time.
• C. He demanded that how do I manage to finish my work always in time.
• D. He questioned me as to how did I manage to finish my work always in time.