What is an important step to take when verifying a newly proposed network security solution？ （）

• A、Test the design on a pilot network for expected results prior to implementing on the production network.
• B、Run a network audit to determine types of traffic in use on the network.
• C、Launch campus updates into the production network and monitor impact to see if configuration changes are needed.
• D、Create an interruption of data flow to determine test "back-door" access methods.