题目

Research by Scotland Yard published in a London newspaper, has proven that knife crime in London is a serious non – white phenomenon, with 165 of the 225 under- 18s accused of knife crime in the past three months being from the black or other non – white groups．        According to Scotland Yard, only 60 of the 225 crimes were white．Despite being a small minority of the knife holding criminals, whites did, however, make up the single largest group of victims of knife crime．        According to the Scotland Yard report, whites made up 222 of the 637 victims of knife crime （2008年广东卷，文基，21）明初，朝臣建议建文帝削藩。随后，建文帝的叔叔燕王朱棣以清君侧为名起兵，最后占领南京，夺取帝位。此事说明当时   A.实行了内阁制                             B.设立了军机处   C．实行了分封制                             D.郡县制受到挑战