Which of the following are other valid items to troubleshoot in this scenario?

The rule set in the virtual appliance is correct

Which of the following are other valid items to troubleshoot in this scenario? (Choose two.)
A . Verify that the 0.0.0.0/0 route in the route table for the web server subnet points to a NAT gateway.
B . Verify which Security Group is applied to the particular web server’s elastic network interface (ENI).
C . Verify that the 0.0.0.0/0 route in the route table for the web server subnet points to the virtual security appliance.
D . Verify the registered targets in the AL
F . Verify that the 0.0.0.0/0 route in the public subnet points to a NAT gateway.

Answer: C,D

Explanation:

https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/using-eni.html