运用加法运算定律，使（8.28+2.69）+4.72运算简便的计算过程是[ ]

A．（8.28+2.69）+4.72

    =（8.28+4.72）+2.69

    =13+2.69

    =15.69

B．（8.28+2.69）+4.72

     =8.28+2.69+4.72

     =10.97+4.72

     =15.69

C．（8.28+2.69）+4.72

     =2.69+8.28+4.72

     =2.69+13

     =15.69