You are correct, the answer A) form a small angle with each other is the correct answer. When towing, the bridle legs that form a small angle with each other will have the least amount of tension on each leg. This is because the forces are more evenly distributed across the bridle when the legs form a smaller angle, rather than a larger angle where the tension would be more concentrated on one leg. The other options are incorrect because: B) joining the legs with a fishplate does not affect the tension distribution, C) a larger angle between the legs would increase the tension on each individual leg, and D) unequal leg lengths also affect the tension distribution, but a small angle is still the optimal configuration.