The correct answer is B) Collision between the tow and the stern of the towing vessel. The danger of an overriding tow is that the tow can collide with the stern of the towing vessel. This happens when the tow moves ahead of the towing vessel, causing the tow to ride up over the stern. This is a significant hazard that can result in damage to both the tow and the towing vessel, as well as the potential for personal injury. The other options are not the greatest danger of an overriding tow. Fouling of the towing hawser (A) is a concern, but not the greatest danger. Tripping (C) is a risk, but not the primary concern in an overriding tow. Loss of steering (D) is not directly related to the overriding tow situation.