(单选题,2.0分)使用可滚动可更新ResultSet对象更新第2条记录的正确代码是（ ）。

【单选题】
A sql = "select * from sysuser order by userid";ResultSet rs = st.executeQuery(sql);rs.absolute(2);rs.updateString(2, "OK");
B sql = "select * from sysuser order by userid";ResultSet rs = st.executeQuery(sql);rs.absolute(2);rs.updateString(2, "OK");rs.updateRow();
C sql = "select * from sysuser order by userid";ResultSet rs = st.executeQuery(sql);rs.absolute(2);rs.updateString(2, "OK");rs.update();
D sql = "select * from sysuser order by userid";ResultSet rs = st.executeQuery(sql);rs.absolute(2);rs.updateFloat(2, "OK");rs.updateRow();

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