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The correct answer is C.

OBJ-1.4: To answer this question, you must be able to perform a basic subnetting calculation. First, you need to determine the number of IP addresses that will be needed. In this scenario, you have 8 clients that will each need an IP address, but you also need one IP address for the network and a second IP for the broadcast. This means you need 10 IP addresses total. IP addresses are assigned in multiples of 2 (1, 2, 4, 8, 16, 32, 64, 128, 256). Since we need 10 IP addresses, we need to round up to a block of 16. To symbolize a CIDR block with 16 IP addresses, we would use /28, which is 2^4 = 16.

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