【单选题】

Questions 18 to 20 are based on the following passage.At the end of the passage, you will be given 15 seconds to answer the questions.

Now, listen to the passage.
What does the professor tell the students to do about the article on the chemical and physiological workings of the brainA．Read and copy the article.
B．Read the article and write a summary on it.
C．Read the article and write a paper on vitalism and mechanism.
D．Read the article as a preparation for the lecture next week.