下列选项,可以正确获取到兼容了各个浏览器的事件对象的是( )
A. document.onclick = function (event) { var e = window.event || event; }
B. document.onclick = function (event) { var e = window.evt || event; }
C. document.onclick = function (event) { var e = window.event || evt; }
D. document.onclick = function (event) { var e = window.evt || evt; }