What does the USGA's Pace Rating System help determine?

The USGA's Pace Rating System is specifically designed to evaluate and establish the average time it should take to play an entire golf course. This system takes into account various factors such as the layout, the number of holes, and the overall design of the course. By providing a standardized pace of play, the system helps golfers understand the expected time commitment for completing a round, which can enhance the playing experience and encourage better course management among players.

While factors like average green speeds, course difficulty, and measures to address obstacles to faster play are relevant to golf, they don't directly relate to the primary focus of the Pace Rating System. The system specifically targets how long it should take a typical group of golfers to complete their rounds, making this answer the most appropriate choice.