$74)$ By what amount does the intensity level increase when you triple the intensity of a source of sound?

$74)\_\_\_\_\_\_$

A$)4\mathrm{.}8$ dB B$)12$ dB C$)6\mathrm{.}0$ dB D$)9\mathrm{.}5$ dB E$)3\mathrm{.}0$ dB