西周末年，昏庸的周幽王上演了一场“烽火戏诸侯”的闹剧。诸侯率兵前往护卫周王是遵守了                                                                 （  ）

A．封建制的法规

B．禅让制的规则

C．世袭制的传统

D．分封制的义务

Mr. White stayed with my father for two months _______ time he drank all the wine that my father had.[ ]

A. at which          

B. in that          

C. on which          

D. during which