单选题：Which of the following lists memory types from highest to lowest

Which of the following lists memory types from highest to lowest speed?@[D](1)
A. secondary storage, main memory, L2 cache, registers
B. registers, L1 cache, secondary storage, main memory
C. L1 cache, registers, main memory, secondary storage
D. registers, L2 cache, main memory, secondary storage



A.secondary storage, main memory, L2 cache, registers
B.registers, L1 cache, secondary storage, main memory
C.L1 cache, registers, main memory, secondary storage
D.registers, L2 cache, main memory, secondary storage


答案：D