Final answer:
Susan displayed ethical leadership by voluntarily discussing potential product challenges with government regulators, which also embodies corporate transparency and stakeholder engagement.
Step-by-step explanation:
When Susan voluntarily points out a potential challenge with a new product her company is testing during a monthly meeting with government regulators, she is demonstrating ethical leadership. This behavior is distinguished from whistleblower actions as she is not reporting legal violations, but rather she is proactively sharing information about potential issues, which aligns with ethical leadership practices. Corporate transparency is a part of ethical leadership, as it involves openness in the company's operations. However, as a singular act, Susan's behavior is more accurately described as ethical leadership. It also indicates a form of stakeholder engagement, whereby she actively involves and informs the regulators who have a vested interest in the product her company is developing.