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

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. mail someone@localhost -s 'Our Aliases' < /etc/aliases
C. postfix someone@localhost -s 'Our Aliases' < /etc/aliases
D. sendmail someone@localhost -s 'Our Aliases' > /etc/aliases








Answer: B


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