Which playing conditions would hide a student's ball flight errors?

A following wind can indeed mask certain ball flight errors, making it the correct choice. When a golfer hits a shot with a following wind, the wind can add distance and can cause the ball to carry further than it typically would. This can obscure issues related to the initial ball flight trajectory, such as excessive hooks or slices, as the wind may help to straighten the ball's path or prolong its flight.

In calm conditions, students may get a clear view of their ball flight, allowing for accurate analysis of their swing mechanics. Conversely, headwinds and crosswinds tend to exacerbate flight errors, making mistakes more pronounced rather than hiding them. A headwind generally reduces distance and can make any inconsistencies more apparent, while crosswinds can affect the direction of the flight, amplifying hooks or slices. Therefore, a following wind is uniquely capable of disguising poor ball contact or directional issues in a student’s game.