A screening router can perform packet filtering based upon what data?

A.
Translated source destination addresses.

B.
Inverse address resolution.

C.
Source and destination port number.

D.
Source and destination addresses and application data.

Explanation:
The original answer was A (translated source destination address). I did not come
across this term in my reading.
Screening router
A screening router is one of the simplest firewall strategies to implement. This is a popular design
because most companies already have the hardware in place to implement it. A screening router
is an excellent first line of defense in the creation of your firewall strategy. It’s just a router that has
filters associated with it to screen outbound and inbound traffic based on IP address and UDP and
TCP ports.
http://www.zdnet.co.uk/news/specials/2000/10/enterprise/techrepublic/2002/10/article002c.html