What are available width options between the stud holes for the wall bracket to property instal the Cisco TelePresence 1300?

What are available width options between the stud holes for the wall bracket to property instal the Cisco TelePresence 1300?

A.
18, 20 or 24 inches

B.
16, 22 or 24 inches

C.
18, 22 or 24 inches

D.
16, 20 or 24 inches