While Styling for an Anchor Element Within a Section Element

Multiple Choice

While styling for an anchor element within a section element, which of the following specifies a transparent background color?

A) section a: {        background-color: transparent;
          }
B) section a {        background-color: 0;
         }
C) section a {        background-color: transparent;
          }
D) section a {        background-color: 1;
          }