The following output shows an excerpt from a standard network configuration file:
time 37/tcp timserver
time 37/udp timeserver
rlp 39/udp resource # resource location
name 42/udp nameserver
whois 43/tcp nickname # usually to sri-nic
domain 53/tcp
domain 53/udp
mtp 57/tcp # deprecated
bootps 67/udp # bootp server
bootpc 68/udp # bootp client
tftp 69/udp

Which file could this be from?

A.
/etc/hosts

B.
/etc/inetd.conf

C.
/etc/named.conf

D.
/etc/services

E.
/etc/syslog.conf