The Rocket has been busy playing as guest ________ the last month.     [ ]

A. by            

B. since        

C. after          

D. for

保险车辆未投保交强险或交强险合同已经失效的，对于交强险责任限额以内的损失和费用，在商业第三者责任险限额范围内赔偿。