Thunder Is Heard as a Sharp Crack from Nearby but a Low

Multiple Choice

Thunder is heard as a sharp crack from nearby but a low rumble from a far distance because

A) Lower sound frequencies travel through the air faster than higher sound frequencies.
B) Sound intensity decreases by a factor of four each time distance doubles.
C) Air molecules absorb energy at higher sound frequencies more than at lower frequencies.
D) Reverberation decreases as source distance increases.