Answer: a) baptism --
Though many people believe that it
is merely some type of "spiritual
baptism" -- apart from the water -- which saves, Paul shows that the
baptism involved is one in which a person can be buried in and raised
up from -- water baptism. And that one is raised up from this baptism
in order to be with Christ.
As Paul also shows in Romans
6:3,4, one is raised up from water baptism
to "walk in newness of life."