（2014年山东聊城3分）如图是二次函数yax2bxc（a≠

（2014年山东聊城3分）如图是二次函数y=ax²+bx+c（a≠0）图象的一部分，x=﹣1是对称轴，有下列判断：
①b﹣2a=0；
②4a﹣2b+c＜0；
③a﹣b+c=﹣9a；
④若（﹣3，y₁），（，y₂）是抛物线上两点，则y₁＞y₂，
其中正确的是（）

A．①②③

B．①③④

C．①②④

D．②③④

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