Question

According to the Doppler Effect, which statement is true about a sound as it approaches you and then moves away.

Answer 1

A) As the source approaches you, the sound waves are compressed so the pitch of the noise increases.

Answer 2

As the source approaches you, the sound waves are compressed, so
the pitch of the sound is higher than what the source is actually emitting.

Then, after it passes you and begins moving away, the sound waves
are stretched, so the pitch of the sound is lower than what the source
is actually emitting.