What could be a reason for invoking vsftpd from (x) inetd?

A.
Running vsftpd in standalone mode is only possible as root, which could be a security
risk

B.
vsftpd cannot be started in standalone mode

C.
(x) inetd has more access control capabilities

D.
(x) inetd is needed to run vsftpd in a chroot jail

E.
It’s not a good idea, because (x) inetd is not secure