Can you add a dropdown menu inside a navigation bar using CSS 3 dropdowns?

To debug for Section 508 compliance you may want to check that all images contain alt tags. To do this you use:

True or False? The word-wrap and overflow-wrap properties have the same effects.

What CSS3 attribute is not correct

What is the common CSS3 trick used to trigger hardware acceleration on mobile devices?

Have all of the CSS3 properties been implemented in the modern browsers?