Which of the Following Most Accurately Describes Appropriate Method(s) of Serving

Which of the following most accurately describes appropriate method(s) of serving a summons?

A) only by handing it to the person named.
B) by handing it to the person named or by leaving it at their dwelling.
C) by handing it to the person named, leaving it at their dwelling, or by leaving it with a responsible person at the defendant's dwelling.
D) by handing it to the person named, leaving it at their dwelling, leaving it with a responsible person at the defendant's dwelling, or by mailing it to their dwelling.