![](https://cos-cdn.shuashuati.com/pipixue-web/2020-1231-2005-12/ti_inject-812ce.png)
若要选择class名为nav的标签下同时具有href和title两个属性的a元素,下列写法正确的是:
A.
.nav a[href] {background: yellow; color:green;}
B.
.nav a[title] {background: yellow; color:green;}
C.
.nav a[href,title] {background: yellow; color:green;}
D.
.nav a[href][title] {background: yellow; color:green;}