Monica Cheng asked Roeun, "Are you going to visit Germany?

• A. onica Cheng asked Roeun if he is going to visit Germany.
• B. onica Cheng asked Roeun if he had visited Germany.
• C. onica Cheng asked Roeun if had gone to Germany.
• D. onica Cheng asked Roeun if he was going to visit Germany.