One of the most important characteristics of OSPF is Multiple areas. Which statement best describes why this feature is such an important enhancement to earlier routing protocols?（）

• A、The network domain, when divided into areas, allows for the use of both IANA classful addressing and private addressing.
• B、The use of multiple areas allows for the use of prioritization.
• C、All computation is kept within the area, with minimum communication between the areas,allowing the network to scale to  larger sizes.
• D、It is easier to implement security.