Which aspect of qualitative data can also be measured objectively?

The pace of play is the correct choice because it can be quantified in a straightforward manner through specific metrics. For example, it can be measured in terms of time taken for a standard round of golf, the number of rounds completed in a day, or the average time per hole. These measurements provide objective data that can be analyzed to assess how efficiently the course is being played.

In contrast, while the quality of staff performance, customer complaints, and the physical condition of the grounds involve subjective elements and qualitative assessments, they do not lend themselves to the same level of straightforward measurement. Staff performance may include intangible traits such as attitude and interpersonal skills which are subjective. Customer complaints can vary widely in nature and severity, making them difficult to evaluate consistently. The physical condition of the grounds involves visual and experiential aspects that may be assessed qualitatively rather than quantitatively.

This distinction emphasizes how pace of play stands apart by being a clearly observable and measurable variable that can be tracked and analyzed numerically.