Final answer:
Option A, which states that the expository essay excerpt uses a formal style, is likely correct because expository essays aim to clarify topics using logical structure and evidence to support claims.
Step-by-step explanation:
The question asks which statement is true about an expository essay excerpt, and the options are related to style and structure. Given the content provided about expository essays, which are meant to explain or clarify a topic logically and clearly, it can be inferred that expository essays would utilize a formal style to accomplish this goal. This is because an expository essay needs to break down the topic into parts and explain each component in a manner that supports the overall explanation, often using evidence to back claims. The use of well-chosen transitions and a focus on the thesis statement are indicative of a formal style as well. Therefore, Option A, which states that the essay uses a formal style, is the most likely answer to accurately describe the expository essay excerpt.