Which sentence contains a misplaced modifier?

The orchestra members prepared for the performance, tuning their instruments.
The conductor shook hands with Michael Guerro, the orchestra's concertmaster.
After walking onto the stage, the conductor bowed to the audience in greeting.
Listening to the beautiful blend of sounds, I marveled at the musicians' talent.

Question

Which sentence contains a misplaced modifier?

    The orchestra members prepared for the performance, tuning their instruments.
    The conductor shook hands with Michael Guerro, the orchestra's concertmaster.
    After walking onto the stage, the conductor bowed to the audience in greeting.
    Listening to the beautiful blend of sounds, I marveled at the musicians' talent.

anonymous · Answer

A 

but this would be an English Question

anonymous · Answer

You posted this in the Biology section lol. But A is the right answer.