Which of the following sentence could serve as an effective topic sentence for the following paragraph? "_________________________________________________________________. In European universities, students are not required to attend classes. In fact, professors in Germany generally do not know the names of the students enrolled in their courses. In the United States, however, students are required to attend all classes and may be penalized if they do not. Furthermore, in the European system, students usually take just one comprehensive examination at the end of their entire four or five years of study. In the North American system, on the other hand, students usually have numerous quizzes, tests, and homework assignments, and they almost always have to take a final examination in each course at the end of each semester."
A、Professors in European universities are more lenient than that in American universities.
B、Generally speaking, American universities places more emphasis on class attendance than European universities do.
C、The education styles of European universities and American universities differ in many aspects.
D、When given a choice, many students prefer attending European universities than American universities.
题目内容
（请给出正确答案）
简答题官方参考答案
（由简答题聘请的专业题库老师提供的解答）
1. How does the artist want us to feel about Jane’s execution?
