When One Person Was Talking in a Small Room, the Sound

Multiple Choice

When one person was talking in a small room, the sound intensity level was 60 dB everywhere within the room. Then, there were 14 people talking in similar manner simultaneously in the room, what was the resulting sound intensity level?

A) 60 dB
B) 79 dB
C) 71 dB
D) 64 dB
E) 69 dB