Using the advice in the writing style section, choose the style mistake in the following sentence: "Mrs. Johnson expelled Lexi from the class because she was having a temper tantrum."

The reason this choice is correct lies in the ambiguity of the pronoun "she" within the sentence. The construction makes it unclear whether "she" refers to Mrs. Johnson or Lexi. This type of ambiguity can lead to misunderstandings and confuse the reader regarding who actually had the temper tantrum. In academic writing, clarity is paramount, and sentences should always make it explicit who or what is being referred to. By restructuring the sentence to specify that Lexi was the one having the temper tantrum, the writer would eliminate this confusion and enhance the clarity of the communication. This adjustment aligns with the guidelines of effective writing that emphasize the importance of avoiding ambiguous references.