You perform a security audit of a server named CRM1. You want to build a list of all DNS requests that are initiated by the server. You install the Microsoft Network Monitor 3.0 application on CRM1. You capture all local traffic on CRM1 for 24hours. You save the capture file as data.cap. you find that the size of this file is more tahn 1GB. you need to create a file named DNSdata.cap from the existing capture file taht contains only dNS -related data  What should you do（）？ 

• A、apply the display filter !DNS and save the displayed frames as DNSdata.cap file
• B、Apply the capture filter DNS and save the displayed frames as a DNSdata.cap file
• C、Add a new alisa named DNS to the aliases table and save the file as DNSdata.cap
• D、Run the nmcap.exe /inputcapture data.cap /capture DNS /file DNSdata.cap command.