我核对了原题,你的题目打错了,确切的说是你的空放错了位置.
原题:The boss,not the workers.They just carried out the order______.
句意:-谁应该对这起事故负责?
-老板,不是工人.他们只是执行被告诉的命令.
从句意可知,workers和tell之间应当是被动关系,排除C和D.
而当从句主语和主句主语一致时,且从句中有be动词时,那么从句主语和be动词可以同时省去.
A项可以补全为They just carry out the order as they were told.