【单选题】【消耗次数:1】
集合A={a,b,c},A上的二元关系R={<a,a>&lt;A,A&gt;,&lt;B,B&gt;,&lt;A,C&gt;<b,b><a,c>},则R具有以下性质()。</a,c></b,b></a,a>
自反性、反对称性、传递性
反自反性、反对称性、传递性
对称性、传递性
反对称性、传递性
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