Here's why: - Clarity and Flow: The original sentence is grammatically correct and flows smoothly. The phrase "even though" effectively connects the two parts of the sentence, showing the contrast between their closeness and their different educational paths. Let's look at why the other options are less suitable: - B. close, yet even: While "yet" can be used to show contrast, it's slightly less formal than "even though" and might not fit the tone of the sentence.- C. close; even: The semicolon creates a stronger break than necessary, making the sentence feel slightly disjointed.- D. close.Even: The period creates a complete stop, making the sentence awkward and less cohesive. The original sentence maintains the most natural and logical flow of ideas.