Final answer:
Cache levels L1 and L2 are usually built onto the processor chip, providing fast access times for the CPU. L3 cache may also be on the chip, but it is not as common and can sometimes be separate.
Step-by-step explanation:
Cache memory is an important component in determining a computer's processing efficiency. Cache memory comes in several levels, commonly referred to as L1, L2, and sometimes L3. The L1 and L2 cache levels are usually built directly onto the processor chip itself. This allows for extremely fast access times as they are in close proximity to the CPU cores, and they operate at the same speed as the CPU. In many modern processors, a L3 cache is also included, which is also often on the processor chip but shared between all cores. However, in some designs, the L3 cache might be on a separate die or part of the CPU package but not on the same silicon chip as the cores. Therefore, when discussing which cache levels are typically built onto the processor chip, the correct answer is generally B. L1, L2.