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The correct answer is C.

OBJ-3.2: Error checking and correcting or error correcting code (ECC) is a type of system memory that has built-in error correction security. ECC is more expensive than normal memory and requires support from the motherboard. ECC is commonly used in production servers and not in standard desktops or laptops. Single-channel memory is any memory using one 64-bit bus between the CPU and the RAM. Dual-channel memory is a memory controller with two primary pathways through the bus to the CPU to transfer 128-bits of data in each transaction. Non-parity memory is a type of system memory that does not perform error checking except when conducting the initial startup memory count.

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