A.Memory mirroring and hot swap memory
B.Memory mirroring and hot spare memory
C.Four way memory interleaving and chipkill
D.Four way memory interleaving and memory mirroring

A.The DIMMs used for 2-way interleaving are double the width of DIMM used in 4-way interleaving.
B.The DIMMs used for 2-way interleaving are 64-bit wide and data bits are accessed both on the rising edge and falling edge of the clock cycle.
C.The DIMMs used for 2-way interleaving are 32-bit wide and data bits are accessed both on the rising edge and falling edge of the clock cycle.
D.The DIMMs used for 2-way interleaving are double the width and data bits are accessed both on the rising edge and falling edge of the clock cycle.