How do the High Capacity couplers differ from Standard couplers in design?

Answer: B — Corner shape

High Capacity couplers differ from Standard couplers primarily in their corner shape, which is specifically designed to improve performance and reliability in heavy-duty applications. The corner shape of High Capacity couplers is engineered to enhance the coupling process under various loading conditions, allowing for a more secure and stable connection between cars, especially in high-stress situations typically encountered in freight operations. This design modification contributes to increased strength and the ability to handle greater forces during coupling and decoupling, which is essential for maintaining safety and operational efficiency in transporting heavy loads.