Answer:
Joanna's percentile rank of 60 does not provide any information about the actual score she received on the test or the difficulty of the test. Therefore, her parents would need to know the range of student scores in Joanna's class or the actual scores of other students to determine how well Joanna performed compared to her peers. Option D, "The range of student scores in Joanna's class," is the most relevant and helpful information for interpreting her percentile rank.