如下图所示，各烧杯中盛有海水，铁（含杂质C）在其中被腐蚀由快到慢的顺序为

A．②①③④⑤⑥                                                B．⑤④③①②⑥
C．⑤④②①③⑥                                                D．⑤③②④①⑥