How would a user send /etc/aliases as the text of an email to another user on the same system?

A.
wall -s ‘Our Aliases’ > /etc/aliases

B.
postfix someone@localhost -s ‘Our Aliases’ < /etc/aliases

C.
sendmail someone@localhost -s ‘Our Aliases’ > /etc/aliases

D.
mail someone@localhost -s ‘Our Aliases’ < /etc/aliases