Final answer:
CPU benchmarks are measures of performance that aid in comparing different CPUs, most relevant for choosing between different processor brands. They are not intended for decisions regarding monitors, cases, or graphics cards.
Step-by-step explanation:
A CPU's benchmarks are an indicator of a processor's performance across various tasks and can be used to compare the capabilities of different CPUs. Therefore, benchmarks help you decide between:
- Different processor brands, comparing how well processors from various manufacturers perform.
- Buying a bigger monitor, which is not related to CPU performance.
- Choosing a computer case, which is also unrelated to CPU performance.
- Selecting a graphics card, though benchmarks can give an idea about CPU's performance in conjunction with GPU's, the benchmarks referred to here are primarily for evaluating CPU performance, not GPU performance.
In summary, when considering the function of CPU benchmarks, they are most relevant for deciding between different processor brands (option A) rather than the other choices which don’t directly correlate with the CPU's performance.