Final answer:
The third principle to deconstruct an argument is subjective, but considering the audience's perspective is critical for a comprehensive analysis and effective argumentation.
Step-by-step explanation:
The third principle to determine how to deconstruct an argument would typically involve analyzing different aspects of the argument to understand its effectiveness and structure comprehensively. While options A, B, C, and D each represent valid steps in this process, context suggests that determining the third principle is subjective and could vary based on the method one is following. However, for a comprehensive analysis that would help in drafting and evaluating arguments effectively, considering the audience's perspective (D) is often critical. Audience perspective can shape your choice of rhetorical devices such as ethos, pathos, and logos. Additionally, understanding your audience helps you to create contextually responsive compositions. To explore this further, when interpreting sources, one might consider the author, the audience, the intent, and the context. This allows for a critical understanding of the argument as a cultural artifact, providing a more nuanced deconstruction.