The correct answer is A) When sailing with the wind aft. The wing and wing configuration, where the mainsail is set on one side and the headsail is set on the other, is an ideal setup when sailing with the wind directly aft (behind the boat). This configuration allows the boat to sail efficiently with the wind directly behind it, as the sails are optimized to capture the wind and propel the boat forward in this particular wind direction. The other options are not the ideal situations for a wing and wing setup. B) When on a close reach, the sails would be trimmed differently to maximize performance. C) When anchored or drifting, the sails would typically be furled or lowered. D) When tacking, the sails would need to be adjusted as the boat changes direction.