Which of the following procmail rules should be used, so that all incoming emails are processed by vacation?

A user is on holiday for two weeks. Anyone sending an email to that account should receive an
autoresponse.
Which of the following procmail rules should be used, so that all incoming emails are processed by
vacation?

A.
:0c:
| /usr/bin/vacation nobody

B.
:w
| /usr/bin/vacation nobody

C.
:0fc:
|/usr/bin/vacation nobody

D.
| /usr/bin/vacation nobody

E.
:> |/usr/bin/vacation nobody