Which of the following results in demerits regarding practice times?

Being late to practice is a key factor that results in demerits as punctuality is often emphasized in drill team practices. Arriving on time sets a standard for discipline and respect for the time and effort of every team member. When a member is late, it disrupts the flow of practice and can affect the team's overall performance.

In contrast, arriving early is viewed positively as it shows initiative and commitment, while participating in discussions enhances team cohesion and communication. Leaving early can also be problematic, but it is primarily being late that directly impacts the structure and effectiveness of the practice session, leading to the assignment of demerits. Thus, timeliness is crucial, and being late is viewed as a breach of expected conduct in a drill team setting.