Q. "What's that noise? It sounds like an aeroplane," said Ravi.

• (A) Ravi asked what the noise was, adding that it sounded like an aeroplane.
• (B) Ravi demanded to know what the noise was, saying that it sounded like an aeroplane.
• (C) Ravi asked what the noise could have been saying that it sounded like an aeroplane.
• (D) Ravi wondered about the noise thinking that it sounded like an aeroplane.