Intermediate CSS3 and HTML5

In the tag <img src="sample.png" alt="sample"> the src part is what?

A. A CSS property
B. Rendering engine
C. A value
D. An attribute

In the tag <p style="background-color:silver"> what is the background-color: part?

A. A CSS property
B. A text editor
C. A style rule
D. An HTML attribute

Which of the following contain style rules than can apply to multiple pages in a site?

A. Internal style sheet
B. External style sheet
C.   Inline style
D. Property sheet

In CSS code that's written -moz-background: or -webkit:background: what are the -moz- and -webkit- parts?

A. Vendor prefixes
B. HTML attributes
C. Values
D. Operating systems

Which rendering engine is used by the Firefox Web browser?

A. Gecko
B. Trident
C. Webkit
D. Presto