Answer: D) Our (11th-grade) victory garden will include carrots, turnips, beets, and spinach.
Step-by-step explanation: parentheses are used to mark a word or phrase inserted as an explanation or afterthought into a passage which is grammatically complete without it. From the given options, the one that uses parentheses correctly, is the corresponding to option D: Our (11th-grade) victory garden will include carrots, turnips, beets, and spinach, because notice that if we remove "11th-grade" from the sentence, it remains grammatically complete.