Which of the following commands allows an administrator to add an existing user’s phone number

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