Answer: D) Improved her performance on the court.
Explanation: The tone of a text or sentence is the author's or speaker's attitude towards the audience, the subject or even the characters of the text. There are many different kinds of tones, like: positive, negative, objective, sad, angry, etc. From the given options, the phrase that best completes the given sentence to give it an objective tone is the corresponding to option D: Improved her performance on the court, because it is expressing a fact rather than an opinion.
