Explanation:

The correct answer is (e) None of these, as all other options contain inaccuracies or are definitively false. (a) Virtual memory is the space on the hard drive where the O.S. begins to store data when it because memory bound: This statement is poorly phrased and partially inaccurate. Virtual memory *is* space on the hard drive (or other secondary storage) used by the OS to simulate more RAM than physically available. It's utilized when physical RAM is insufficient (memory bound), allowing the OS to temporarily move less-used data from RAM to disk (paging or swapping) to free up RAM for active processes. The phrasing 'begins to store data when it because memory bound' is grammatically awkward and doesn't fully capture the dynamic nature of virtual memory management. (b) Accessing data from RAM is slower than accessing data from virtual memory: This statement is definitively false. Random Access Memory (RAM) is a volatile, high-speed memory that provides very fast data access. Virtual memory, which relies on disk storage (e.g., hard drives or SSDs), is significantly slower—orders of magnitude slower—than physical RAM. When data needs to be accessed from virtual memory, it must first be swapped back into physical RAM, incurring a substantial performance penalty. (c) Both of these: Since statement (b) is false, this option cannot be true. (d) If a computer is memory bound, adding more RAM will not solve the problem: This statement is false. If a computer is 'memory bound' (meaning it frequently runs out of physical RAM and relies heavily on slow virtual memory, leading to 'thrashing'), adding more physical RAM is precisely the most effective solution to improve performance. More RAM reduces the need for constant, slow disk swaps, allowing the system to keep more active data in fast memory.