When a Source of Sound Approaches, Measurements Will Show an Increase

Multiple Choice

When a source of sound approaches, measurements will show an increase in the sound's

A) speed,
B) frequency,
C) wavelength,
D) all of these,
E) none of these,
And when a source of sound recedes, measurements will show an increase in the sound's
F) speed.
G) frequency.
H) wavelength.
I) all of these.
10) none of these.