After revision, what was improved significantly in Carl's writing?

The significant improvement in Carl's writing after revision was in word precision. This means that he focused on choosing specific, effective words that conveyed his ideas more clearly and accurately. By enhancing word precision, Carl was likely able to communicate his thoughts more effectively, reducing ambiguity and ensuring that his audience fully understood his intended message.

Improving word precision typically involves replacing vague or generic terms with more descriptive and accurate language, which can make writing more engaging and impactful. This refinement helps in enhancing the overall quality of the writing, as precise words often resonate better with readers and convey the writer's ideas with greater clarity.

The other options might not reflect the primary focus of Carl's revision. For instance, while flow of ideas, sentence complexity, and content length are all important aspects of writing, the question specifically emphasizes the aspect that was improved most significantly. In this case, the clarity and impact of word choice took precedence in the revision process.