【正确答案】
C
【答案解析】A选项,(a*b)*c=(a-b)-c,a*(b*c)=a-(b-c)=a-b+c,(a*b)*c≠a*(b*c),则A项不满足可结合性;B选项,(a*b)*c=(a+2b)+2c,a*(b*c)=a+2(b+2c)=a+2b+4c,(a*b)*c≠a*(b*c),则B项不满足可结合性;C选项,(a*b)*c=min(a,b,c)=a*(b*c),则C项满足可结合性;D选项,(a*b)*c=||a-b|-c|,a*(b*c)=|a-|b-c||,(a*b)*c≠a*(b*c),则D项不满足可结合性,故选C。