You are CCNA VOICE associate in Certkey.com. When you place a call to 2000, phones 1 and 2 are paged. When you place a call to 2001 pages phones 3 and 4. What command is missing so that a call to 2002 pages all phones1,2,3,4?

A.
paging group 20 21

B.
paging group 10 20

C.
paging group all

D.
paging group 2000 2001 2002