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The simplest technique for logically organizing cache is __________.

A. stack mapping B. associative mapping C. direct mapping D. set-associative mapping

If a program happens to reference words repeatedly from two different blocks that map into the same line, the blocks will be continually swapped in the cache, and the hit ratio will be low, is a phenomenon known as __________.

A. tagging B. split caching C. cache missing D. thrashing