Answer: C) The booster club provided a tray of fresh watermelon slices.
Explanation: The passive voice is a style of writing where what would be the object of a sentence becomes the subject of the sentence. In the case of the given sentence, the object of the sentence would be "a tray of fresh watermelon" but it is acting as the subject. From the given options, the one that revise the sentence using active voice is the corresponding to option C: the booster club (subject) provided a tray of fresh watermelon slices (object).