You want to create a standard access list that denies the subnet of the following host: 172.16.50.172/20. Which of the following would you start your list with?

• A. access-list 10 deny 172.16.48.0 255.255.240.0
• B. access-list 10 deny 172.16.0.0 0.0.255.255
• C. access-list 10 deny 172.16.64.0 0.0.31.255
• D. access-list 10 deny 172.16.48.0 0.0.15.255