Compensation surveys are used to:

Comprehensive and Detailed in Depth Explanation:

Compensation surveys collect data on pay and benefits from other organizations, typically within the same industry or region, to help employers benchmark their pay practices against competitors. This ensures their compensation is competitive to attract and retain talent.

Option A (Benchmark pay practices against competitors): Correct, as this is the primary use of compensation surveys.

Option B (Identify hiring trends within the industry): While surveys may provide some hiring insights, their main focus is on pay data.

Option C (Calculate an organization's return on investment (ROI)): ROI is a financial metric, not directly related to compensation surveys.