Every large language model processes input and generates output in units called tokens. A model ' s context window defines its maximum token capacity. If an input prompt—along with the lengthy documents provided within it—exceeds this context window limit, the model will either reject the request or truncate the text, failing to process the complete document context. Options B, C, and D are incorrect because token count is an architectural and computational measure of data volume/capacity, not a control for creativity, processing power reduction, or content safety filtering.