What is the function of Coverage Mode?

Coverage Mode is designed to enhance the efficiency of document retrieval by prioritizing the display of mid-rank documents first. This feature is particularly beneficial in scenarios where a balanced and comprehensive understanding of the data is essential. By focusing on mid-ranked documents, Coverage Mode ensures that users are not just presented with the most prominent or highest-ranked items, but rather a representative sample of the overall dataset.

This approach helps in identifying relevant information that might not be immediately visible if only the highest-ranked documents were considered. It effectively broadens the perspective on the data, allowing for better analysis and informed decision-making.

The other options do not accurately represent the function of Coverage Mode. For instance, serving up highest-rank documents first would limit the breadth of information presented, which goes against the objective of ensuring comprehensive coverage. Excluding low-rank documents from the queue would circle back to focus solely on a select few documents rather than providing a well-rounded view. Lastly, stopping the queue from functioning contradicts the very purpose of Coverage Mode, which is to facilitate document retrieval rather than hinder it.