22. There is a great deal of controve rsy about the appropriate ways to discipline children, A) yet discipline is often confused with punishme ent and control B) but there is great difference of opinion on the effects of various disciplinary methods C) and parents are often confused about how to set limits on their children s behaviour D) although methods of child discipline vary widely between families of different cultures E) while the use of physical punishme ent for discipline has aroused much discussion

The correct answer is B) but there is great difference of opinion on the effects of various disciplinary methods.<br /><br />The sentence is discussing the controversy surrounding the appropriate ways to discipline children. Option B) provides a contrast to the controversy by stating that there is a great difference of opinion on the effects of various disciplinary methods. This option adds more information to the sentence and provides a logical contrast to the controversy mentioned in the first part of the sentence.