When can you use the $$Use my Internet connection$($VPN$)$ link?

Question $3$ Answer

a$.$

When connecting to a network with a dissimilar operating system

b$.$

When connecting to the Internet using a Remote Access Dialup Server $($RADS$)$

c$.$

When connecting to a legacy system or network

d$.$

When connecting to the Internet on an established active connection to the Internet