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

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

A.
debug pim nak

B.
debug ip router nak

C.
debug ip pgm router nak

D.
debug ip pgm nak

E.
show nak