You may create a new vApp under which of the following conditions
(Choose Two)?

A.
The ESX Server must be version 4.x

B.
The ESX Server can be version 3.0 or later

C.
The ESX Server can be a standalone host or reside in a DRS Cluster

D.
The ESX Server hosting the vApp must in a DRS-enabled Cluster

Explanation:

According the documentation of VMware the correct answers should be "The ESX
Server can be version 3.0 or later" and "The ESX Server hosting the vApp must in a
DRS-enabled Cluster"
"vSphere Basic System Administrator, page 106, Create a vApp"
You may create a new vApp under the following conditions:
A host is selected in the inventory that is running ESX 3.0 or greater.
A DRS-enabled cluster is selected in the inventory.
vApps can be created on folders, hosts, resource pools, DRS-enabled clusters, and within
other Apps.