问题：
[单选题]You have been asked to come up with a subnet mask that will allow all three web servers to be on the same network while providing the max number of subnets.Which network address and subnet mask meet this requirement?（）
A、192.168.252.8 255.255.255.248
B、192.168.252.8 255.255.255.252
C、192.168.252.16 255.255.255.240
D、192.168.252.0 255.255.255.252
E、192.168.252.16 255.255.255.252
参考答案：
A
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