Which of the following best describes the relationship between paragraphs 3 and 4 in the passage? A. Paragraph 4 provides further evidence of the economic growth of Siam discussed in paragraph 3. B. Paragraph 4 continues the discussion begun in paragraph 3 of farming improvements that led to economic growth. C. Paragraph 4 examines a particular effect of the Bowring Treaty mentioned in paragraph 3. D. Paragraph 4 discusses the second of two factors that contributed to the expansion of rice farming mentioned on paragraph 3.