What does it mean to act in accordance with what is deemed ethical or acceptable?

To act in accordance with what is deemed ethical or acceptable means to align one's actions with moral principles and standards that are widely accepted as right or good. Choosing "rightly" emphasizes the alignment with ethical norms and values. It signifies a commitment to doing what is considered morally appropriate in a given context.

While the other options—correctly, fairly, and justly—also pertain to moral behavior, they focus on slightly different aspects of ethics. "Correctly" suggests the accuracy of action rather than its moral implications. "Fairly" emphasizes equity, focusing on impartiality and equality in treatment, which is an important aspect of ethics but not comprehensive of all ethical considerations. "Justly" highlights adherence to justice, which relates to fairness and lawful conduct but can be viewed as a subset of broader ethical behavior. In contrast, "rightly" encapsulates the broader idea of doing what is ethically sound without limiting it to specific contexts such as fairness or justice alone.