When the speaker S1 is switched ON, the sound intensity at a point P in a room is $$80\,\text{dB}$$. But when the speaker S2 is switched ON, with S1 switched OFF, the sound intensity at the same point P in the room is $$85\,\text{dB}$$. The sound intensity level at the same point P if the two speakers are simultaneously switched ON is, considering the speakers to be incoherent

A

$$165\,\text{dB}$$

B

$$86.2\,\text{dB}$$

C

$$87.8\,\text{dB}$$

D

$$88.6\,\text{dB}$$