Read the passage. Our school should require students to take music classes. Music allows people to express themselves. Some people say that music is a universal language. By taking a music class, students will better understand one another. Additionally, taking a music class might improve students' grades in other classes. Which statement best explains the purpose of the analogy in the passage?
A. It shows that music is popular in many schools
B. It emphasizes how music can bring people together
C. It describes the types of music students could study
D. It demonstrates how music can help students get good grades
