What distinguishes Example A's writing style in flu symptom descriptions?

The characteristics of writing styles can vary significantly based on voice and abstractness. In the context of flu symptom descriptions, a more abstract style is achieved when the writing utilizes the passive voice. This creates a level of detachment from the action, resulting in a style that may seem less direct and more general. A passive construction can focus on the symptoms themselves rather than the subject experiencing them, which contributes to an abstract quality.

Using the active voice, in contrast, typically increases clarity and engagement by making the subject of the sentence active and at the forefront. While this might be more precise, it does not inherently give an abstract quality to the writing.

The other options look at different aspects of writing style, but they do not capture the essence of what makes Example A's writing more abstract. Noticing a simpler structure in another example does not directly address the complexity of Example A's style, nor does the absence of style errors provide insight into the nature of the writing itself. Thus, the distinguishing feature of Example A's writing style lies in its use of passive voice, leading to a more abstract depiction of flu symptoms.