Refer to the exhibit.
.
A network administrator has begun configuring a Protocol Independent Multicast Sparse Mode (PIM-SM) solution on all of the network infrastructure devices shown in the exhibit. The administrator has selected the static method for configuring rendezvous (RPs) and wants to use 4 as RP.
Where must the administrator configure the static RP setting?
A. On IRF 3 and IRF 4 only
B. On switch 1, IRF 2, IRF 3, and IRF 4
C. On IRF 2, IRF 3, and IRF 4 only
D. On IRF 2 and IRF 3 only