which two vSphere entities can be added?

When modifying a vApp, which two vSphere entities can be added? (Choose two.)

A.
A resource pool

B.
A network pool

C.
A vApp

D.
A folder

Explanation:
A resource pool and a network pool can be added when modifying a vApp.
http://wahlnetwork.com/2012/02/01/understanding-resource-pools-in-vmware-vsphere/