Read the following article and answer the question. Article: Peter: Paul, what are you going to do this afternoon? Paul: I plan to climb a hill. Would you like to go with me? Peter: Thank you. But I don't want to be tired. I want to sleep at home. Have a good time! Paul: I'm sure I will. But now I don't know what to wear. Peter: What about your new trousers? Paul:My new trousers are made of wool. I don't think they can make me comfortable. Peter: You're right. Wool clothes are not fit for a trip. How about your blue jeans? What are they made of? Paul: Cotton. They are good for trips. And shall I wear my leather shoes? Peter: No. They will make your feet hot. You know, it is hot these days. And they are also too heavy for a trip. Try your trainers. Paul: OK. And trainers go well with my jeans. Peter: And why not wear your cap? It looks cool on you. Paul: Thank you. I will wear it. Question: What is/are made of wool? Answer:
Available choices:
a). Paul's new trousers.;
b). Paul's blue jeans.;
c). Paul's trainers.;
d). Paul's cap.;
Answer:
a).