Answer:
The correct option is B.
Explanation:
Memory hierarchy is the ordering of storage systems according to their speed, capacity and cost.
The hierarchy consist of Register as the top, followed by cache, then main memory, secondary memory and external storage. As you go down the hierarchy, the speed decreases, the size increases and the cost decreases also.
Memory hierarchy diagram is attached for reference.
Any HP laptop would be good! What is your price range?
Also, if it is for school, have you considered getting an iPad? It is great for taking notes and looking stuff up and being portable. My friends currently use it