A Person Standing in the Street Is Unaware of a Bird

Multiple Choice

A person standing in the street is unaware of a bird dropping that is falling from a point directly above him with increasing velocity. If the dropping were producing sound of a fixed frequency, as it approaches the person would hear the sound

A) drop in frequency.
B) stay at the same frequency.
C) increase in frequency.
D) decrease in loudness.
E) stay at the same loudness.