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Which statement best explains why SRAM is used for cache memory while DRAM is used for main memory?

A. SRAM is slower but cheaper than DRAM
B. SRAM does not require constant refreshing, making it faster but more expensive
C. DRAM retains data even when power is off
D. SRAM has higher storage density than DRAM
Correct Answer: B. SRAM does not require constant refreshing, making it faster but more expensive

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