Which of the following commands would you use to specifically view PGM NAKs, NAK confirmations, and

Which of the following commands would you use to specifically view PGM NAKs, NAK confirmations, and null NAKs?

A.
debug ip pgm nak

B.
show nak

C.
debug pim nak

D.
debug ip router nak

E.
debug ip pgm router nak