The equation of line $$l_1$$ is ax+by+c=0. Line $$l_2$$ is perpendicular to line $$l_1$$. The line $$l_2$$goes through the point (2c,0). Which of the following is the equation of line $$l_2$$?
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Abx-ay+bc=0
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Bbx-ay+2bc=0
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Cax-by-2bc=0
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Dbx-ay-2bc=0
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Ebx-ay-bc=0
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正确答案: D