What is a “sticky” connection?

A.
A Sticky Connection is one in which a reply packet returns through the same gateway as the
original packet.

B.
A Sticky Connection is a VPN connection that remains up until you manually bring it down.

C.
A Sticky Connection is a connection that remains the same.

D.
A Sticky Connection is a connection that always chooses the same gateway to set up the initial
connection.