Which of the following is true about primary storage?

The correct answer is D. All of the above.

Primary storage is the computer’s main memory, which is used to store data and instructions that are currently being used by the CPU. It is typically much faster than secondary storage, such as a hard drive, and is therefore used to store data that needs to be accessed quickly. Primary storage is also typically more expensive than secondary storage.

Here is a brief explanation of each option:

• Option A: Primary storage is a part of the CPU. This is because the CPU needs to be able to access data and instructions quickly in order to perform its tasks.
• Option B: Primary storage allows very fast access to data. This is because it is located very close to the CPU and is therefore able to be accessed much more quickly than data that is stored on a hard drive or other secondary storage device.
• Option C: Primary storage is relatively more expensive than secondary storage. This is because it is a more complex and sophisticated type of storage.

I hope this helps!