单选题The father stood up 

问题补充：

单选题Thefatherstoodupinordertoprotecthis15-year-oldson,sayingthathewasnottheone.A.blamedB.blamingC.to blameD.being blamed

答案：

C解析考查不定式作定语。短语： 应受责怪be to blame,句意：父亲站起来为了保护他十五岁的孩子，说他不是受责怪的那个人。to blame作后置定语修饰the one，相当于定语从句who was to blame,所以选C。