All of them :))))))))))))))))))))))
Answer: A. It peaks Jeff's (and the camera's) curiosity and causes him to look
Explanation:
In Rear Window, Hitchcock made use of diegetic sound which were from the courtyard space and the narrative time. Also, at the beginning of the film, there was scored soundtrack.
In Rear Window, Hitchcock use sound outside the window as it peaks Jeff's (and the camera's) curiosity and causes him to look. Therefore, the correct option is A.
It is most often used in appliances, such as refrigerators, freezers, water coolers, but it is also used for residential air conditioning and heat pump products up to 5 tons. I belive