You are attempting to connect to an instance in Amazon VPC without success. You have already verified that
the VPC has an Internet Gateway (IGW) the instance has an associated Elastic IP (EIP) and correct security
group rules are in place.
Which VPC component should you evaluate next?

A.
The configuration of a NAT instance

B.
The configuration of the Routing Table

C.
The configuration of the internet Gateway (IGW)

D.
The configuration of SRC/DST checking

Explanation:
http://docs.aws.amazon.com/ElasticLoadBalancing/latest/DeveloperGuide/UserScenariosForVPC.html