Which of the following behaviors could lead to suspension or expulsion?

Engaging in additional activities that violate school policy can lead to significant disciplinary actions such as suspension or expulsion because these actions directly contravene the guidelines established by the school. Schools implement specific policies to ensure a safe and productive learning environment. When a student participates in activities that breach these rules—such as bullying, using substances on school grounds, or other forms of misconduct—they undermine the school's authority and the well-being of the school community. Such violations can be serious enough to warrant a suspension or expulsion as a means of maintaining order and enforcing the standards of behavior expected within the educational setting.

In contrast, participating in school clubs, while it is a positive engagement, does not contravene any policies. Excessive tardiness, while problematic, typically results in disciplinary measures that are less severe than suspension or expulsion, potentially involving counseling or parental notification instead. Completing homework assignments late might incur academic penalties but generally does not carry the same weight as actions that violate school policies, which can have a direct negative impact on the safety and learning environment of the school.