What shape barge offers the least resistance in river towing?

Correct Answer: Option D — Barges with raked shaped bows

Barges with raked bows are designed to displace water gradually as they move forward, significantly reducing wave-making resistance compared to square-ended or hopper barges. This hydrodynamic efficiency is critical in river towing, where minimizing resistance directly translates to lower fuel consumption and improved speed for the towing vessel.