An administrator is upgrading a vSphere Distributed Switch. The existing switch is version
5.0 and the administrator wants to upgrade to the latest version possible. The environment
contains several ESXi 5.1 hosts. Which two options are available to ensure that the
upgraded switch will be compatible with these hosts? (Choose two.)

A.
Upgrade the ESXi host switches to 5.5, then upgrade the vSphere Distributed Switch to
5.5

B.
Upgrade the vSphere Distributed Switch to 5.1

C.
Upgrade the ESXi 5.1 hosts to version 5.5, then upgrade the vSphere Distributed Switch
to 5.5

D.
Upgrade the vSphere Distributed Switch to 5.5