How can you update a package only if an earlier version is currently installed on the system?

How can you update a package only if an earlier version is currently installed on the system?

A.
rpm-u rpmname

B.
rpm-U rpmname

C.
rpm-force rpmname

D.
rpm -F rpmname

E.
rpm-update rpmname

Explanation:
Upgrades, but only if the package installed.