Answer;
Processor
Cache memory levels are based on proximity to processor.
Explanation;
Cache memory, also called CPU memory, is a small sized high-speed static random access memory (SRAM) that a computer microprocessor can access more quickly than it can access regular random access memory (RAM).
It provides high-speed data access to a processor and stores frequently used computer programs , data and application.
The answer is all of the above
B)
seems to be the most legit