She could have established her own innocence and（ ）easily enough

She could have established her own innocence and（ ）easily enough.
A、vacuum
B、vulgarity
C、vestige
D、virtue
【正确答案】：D
【题目解析】：本题考查名词的词义辨析。vacuum：真空，空白；vulgarity：庸俗，粗野；vestige：残留部分，遗迹；virtue：美德，优秀品质。句意：她本可以轻而易举地证明自己的清白和美德。故D选项符合题意。