The main memory of a computer has 2 cm blocks while the cache has 2c blocks. If cache uses set associative mapping scheme with two blocks per set, then the block k of the main memory maps to set:

• A. (k mod c) of the cache
• B. (k mod m) of the cache
• C. (k mod 2 cm) of the cache
• D. (k mod 2c) of the cache