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The correct answer indicates that quarter bends can be used in soil and waste lines when the change in direction of flow is from horizontal to vertical. In plumbing systems, particularly in soil and waste lines, it is essential to maintain an efficient flow of wastewater and minimize any disruptions that could lead to clogs or improper drainage.

When transitioning from horizontal to vertical, quarter bends are suitable as they facilitate a smooth change in direction, reducing the risk of turbulence or backflow that can occur if the angle of change is too abrupt. This consideration is crucial for maintaining the integrity and efficiency of the plumbing system.

The other options represent transitions that may not utilize quarter bends effectively or may not be standard practice within plumbing codes. For example, a vertical to horizontal change often uses a different type of fitting to accommodate gravity's role in drainage. Understanding the proper use of bends and fittings in plumbing systems ensures compliance with safety and performance standards.