Which of the following are true regarding a network using a subnet mask of 255.255.248.0?（）

• A、It corresponds to a Class A address with 13 bits borrowed.
• B、It corresponds to a Class B address with 4 bits borrowed.
• C、The network address of the last subnet will have 248 in the 3rd octet.
• D、The first 21 bits make the host portion of the address.
• E、This subnet mask allows for 16 total subnets to be created.
• F、The subnetwork numbers will be in multiples of 8.