系统客户投诉处理流程：
=1\*GB3\*MERGEFORMAT①投诉受理；
=2\*GB3\*MERGEFORMAT②投诉转办；
=3\*GB3\*MERGEFORMAT③投诉核实处理；
=4\*GB3\*MERGEFORMAT④投诉处理进程反馈；
=5\*GB3\*MERGEFORMAT⑤投诉督办；
=6\*GB3\*MERGEFORMAT⑥客户回访。
处理流程正确的是（）

A.=1\*GB3\*MERGEFORMAT①=2\*GB3\*MERGEFORMAT②=3\*GB3\*MERGEFORMAT③=4\*GB3\*MERGEFORMAT④=5\*GB3\*MERGEFORMAT⑤=6\*GB3\*MERGEFORMAT⑥
B.=1\*GB3\*MERGEFORMAT①=2\*GB3\*MERGEFORMAT②=4\*GB3\*MERGEFORMAT④=3\*GB3\*MERGEFORMAT③=5\*GB3\*MERGEFORMAT⑤=6\*GB3\*MERGEFORMAT⑥
C.=1\*GB3\*MERGEFORMAT①=3\*GB3\*MERGEFORMAT③=2\*GB3\*MERGEFORMAT②=4\*GB3\*MERGEFORMAT④=5\*GB3\*MERGEFORMAT⑤=6\*GB3\*MERGEFORMAT⑥
D.=1\*GB3\*MERGEFORMAT①=2\*GB3\*MERGEFORMAT②=5\*GB3\*MERGEFORMAT⑤=3\*GB3\*MERGEFORMAT③=4\*GB3\*MERGEFORMAT④=6\*GB3\*MERGEFORMAT⑥