Class rank helps admissions offices to know how students A. did in their classes. B. compare with their classmates. C. compare with others nationwide. D. will succeed in college.?

Class rank helps admissions offices to understand how students compare with their classmates (B). It provides context about a student's academic performance relative to peers in their school, which can be crucial in evaluating their achievements and potential. However, it does not directly indicate how students will succeed in college (D) or how they compare with others nationwide (C).