Questions 11-14 ask about Passage A.
12. The main idea of the second paragraph (the highlighted sentence) is that plastics:
Your Answer is
Correct Answer is F
Explanation
The second paragraph mainly introduces another reason for the popularity of plastic: it is cheap and can be used for mass production.
Item F: "Follow the prevailing trend - good design can also be cheap" is in line with the theme of the second paragraph.
Item H: It is not a challenge, but an opportunity.