Which expression should be added to sentence 2 to best clarify the relationships among Paco's ideas? (1) Today, even many blue-collar, retail, and clerical jobs require applicants to have a college degree. (2) , going to college—even a public college—is becoming more and more expensive. (3) What's a student with little money to do? (4) The only way to make higher education accessible to students with low incomes is to abolish tuition at public colleges.