单选题I left for the offic

问题补充：

单选题Ileftfortheofficeearlierthanusualthismorning_____trafficjam.A.in line withB.in case ofC.for the sake ofD.at the risk of

答案：

B解析in case of 万一---。in line with (=in agreement with) 与......一致, 符合：His actions were not in line with his belief.本句中in line with...作表语。In line with history and social evolution socialism is inevitable.本句中in line with引导地短语作状语, 意为“按照”。For the sake of 为了......起见。At the sake of冒......的风险。