The access time of a word in 4 MB main memory is 100 ms. The access time of a word in a 32 kb data cache memory is 10 ns. The average data cache bit ratio is 0.95. The efficiency of memory access time is

The access time of a word in 4 MB main memory is 100 ms. The access ti

1.	The access time of a word in 4 MB main memory is 100 ms. The access time of a word in a 32 kb data cache memory is 10 ns. The average data cache bit ratio is 0.95. The efficiency of memory access time is
A.	9.5 ns
B.	14.5 ns
C.	20 ns
D.	95 ns
Answer» C. 20 ns