GPUs are optimized for parallel processing, with thousands of smaller cores, while CPUs have fewer, more powerful cores for sequential tasks, correctly highlighting a key architectural difference. NVIDIA GPUs (e.g., A100) excel at parallel computations (e.g., matrix operations for AI), leveraging thousands of cores, whereas CPUs focus on latency-sensitive, single-threaded tasks. This is detailed in NVIDIA's "GPU Architecture Overview" and "AI Infrastructure for Enterprise." Option (A) reverses the roles. GPUs don't have higher clock speeds (B); CPUs do. CPUs aren't for graphics (C); GPUs are. NVIDIA's documentation confirms (D) as the accurate distinction.