King John was forced to put his seal to Magna Carter __________．

King John was forced to put his seal to Magna Carter __________．
A、on July 9,1215
B、on June 19.1215
C、on June 14,1381
D、on July 15,1318
【正确答案】：B
【题目解析】：1215年6月19日，约翰国王被迫在大宪章上盖章。