What class of motions assists the assembly in handling or disposing of a main motion?

The correct answer is subsidiary motions, as they are specifically designed to assist an assembly in addressing and managing a main motion. Subsidiary motions allow members to modify, delay, or ultimately decide on the main motion being considered. For example, these motions can include amendments to change wording or postpone a discussion to a later time.

Utilizing subsidiary motions is essential for orderly and efficient debate, as they enable members to refine the discussion and reach a more satisfactory conclusion regarding the main motion. This structured approach helps ensure that all viewpoints are considered before a final decision is made, thereby enhancing the democratic process within the assembly.

In contrast, privileged motions deal with urgent matters that do not relate directly to the main motion, such as a request for a break or addressing a pressing need. Incidental motions are intended to address procedural issues that arise during the discussion of a motion, such as point of order or appeal. Main motions are the primary proposals being debated, and while they are fundamental to the process, they do not assist in handling or disposing of themselves.