What directive can be used in named.conf to restrict zone transfers to the 192.168.1.0/24 network?

What directive can be used in named.conf to restrict zone transfers to the 192.168.1.0/24
network?

A.
allow-transfer { 192.168.1.0/24; };

B.
allow-transfer { 192.168.1.0-192.168.1.0.255; };

C.
allow-axfr { 192.168.1.0/24; };

D.
allow-xfer { 192.168.1.0/24; };

Explanation:

See http://h30097.www3.hp.com/docs/base_doc/DOCUMENTATION/BIND/DOCU0010.HTM