At an Outdoor Bandstand,what Would Be the Difference in the Sound

Multiple Choice

At an outdoor bandstand,what would be the difference in the sound intensity level (dB) received by a listener 5 m from the bandstand and a listener 40 m from the bandstand,assuming there is no sound reflection? [ $\beta$ = 10 log(I/I₀) ]

A) 8 dB
B) 9 dB
C) 10 dB
D) 18 dB
E) The answer depends on how loudly the band plays.