AtechnicianisreplacingmemoryinaserverwhosemotherboardsupportsPC2100memory.Thistypeofmemoryisalsoknownaswhichofthefollowing?()

AtechnicianisreplacingmemoryinaserverwhosemotherboardsupportsPC2100memory.Thistypeofmemoryisalsoknownaswhichofthefollowing？（）

A、DDR2

B、DDR

C、SDRAM

D、DDR3