What factors influence the ending dates of training sessions?

The ending dates of training sessions are primarily influenced by the beginning date and the duration of the session. The duration is predetermined based on the curriculum designed for that particular training program. Each training session is structured to meet specific educational and practical goals, and thus, the length of time allocated for these components determines when the session will conclude. The starting date creates a timeline that, when combined with the planned duration, establishes a clear endpoint for the training.

Considering other factors such as recruits' performance, availability of instructors, or scheduling conflicts with seasonal and holiday events may impact day-to-day operations or adjustments within a session. However, they do not fundamentally dictate the end date of the training. The systematic approach of starting and completing a defined curriculum is the primary reason B is the correct choice.