问题: [单选题]With prices _______ so much, it is difficult for the school to plan a budget.()ix7答案窝(daanwo.com)-大学作业答案分享平台 Avibratingix7答案窝(daanwo.com)-大学作业答案分享平台 Bfluctuatingix7答案窝(daanwo.com)-大学作业答案分享平台 Cflutteringix7答案窝(daanwo.com)-大学作业答案分享平台 Dswinging