【答案】
分析:分别把4322变成(4321+1),1234变成(1233+1),再根据乘法分配律,进行运算,据此解答.
解答:A=4322×1233,
A=(4321+1)×1233,
A=4321×1233+1233;
B=4321×1234,
B=4321×(1233+1),
B=4321×1233+4321,
4321×1233+1233<4321×1233+4321,
故答案为:C.