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单选题
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.
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