单选题 ______ is on the rise, with over 20% of serious crimes being committed by children under the age of seventeen.
【正确答案】 B
【答案解析】[解析] juvenile delinquency为固定搭配,表示“青少年犯罪”,其他均不符合语境。句意:青少年犯罪在上升,有20%的重罪是17岁以下少年所犯。