Candidate RPs periodically send candidate$-$RP messages directly to the BSR via unicast. They know the BSR address because the BSR messages have been periodically flooded to the all$-$PIM$-$routers group. What multicast IP address is used?

$224\mathrm{.}0\mathrm{.}0\mathrm{.}11$

$224\mathrm{.}0\mathrm{.}0\mathrm{.}12$

$224\mathrm{.}0\mathrm{.}0\mathrm{.}13$

$224\mathrm{.}0\mathrm{.}0\mathrm{.}14$

$224\mathrm{.}1\mathrm{.}1\mathrm{.}13$