Read the following paragraph and identify the sentence that is not appropriate in the paragraph. 阅读以下段落，请找出段落中不合适的一句话。College is more expensive than high school because of tuition, living expenses, and books. (1)Anyone who wants to attend college must pay fees first.(2)College tuition is usually higher than high-school tuition. (3)High school students have no living expenses because the majority of high school students live at home with their parents for free. (4)College is also more expensive than high school when it comes to the cost of learning materials, such as textbooks. In college, students must buy textbooks for each course they take.
选项：

A:1;
B:2;
C:3;
D:4