How can an administrator make an external IP mapping persistent?

How can an administrator make an external IP mapping persistent?

A.
Choose Re-use IP from the drop down menu in the vApp network tab.

B.
Check the Always use assigned IP addresses box for the specific vApp.

C.
Choose the radio button in the vShield Edge device’s External Static IP table.

D.
Check the box in the vShield Edge device’s NAT – External IP tab.