Which of the following commands allows an administrator to add an existing user’s phone number to the system as a comment?

Which of the following commands allows an administrator to add an existing user’s phone number to the system as a comment?

A.
useradd -u bsmith -c 555-1234

B.
usermod -c 555-1234 bsmith

C.
modinfo -u bsmith 555-1234

D.
groupadd -u bsmith -c 555-1234