25. In the passage, the _______ of mastitis are not mentioned. (A) reasons (B) preventives (C) complications (D) remedies

21. According to the article, which of the following statements is correct? (A) Only breast-feeding women are likely to suffer from mastitis. (B) Periductal mastitis is also called puerperal mastitis. (C) Infectious mastitis is contagious due to other women. (D) The lactation mastitis occurs normally in only one breast.