单选题 Parents have become increasingly concerned about the television viewing habits of their children.
【正确答案】 B
【答案解析】interested in：对……感兴趣；，worried about：对……担忧；disappointed with：对……失望；indifferent to：对……漠不关心。题中concerned about意为“对……担忧”，故可知B选项是正确的。