The correct answer is D. A well-supported appeal to logic
Step-by-step explanation:
An argument refers to the statements, evidence, reasons or support provided to prove a point or an idea and showing the speaker or writer's position is the most valid one. Because of this, arguments should be based on logic or facts or follow a logical form rather than appeal to emotions, ethics or any other because even when these can convince the audience, these are not considered as valid arguments. Additionally, for an argument to be effective it needs to be organized in a way it appropriately supports a point or it needs to be well-supported. Based on this, it can be concluded an argument should always rely on logic and therefore and an argument is a well-supported appeal to logic.