A ________ chart is useful in comparing values across categories

A data point:

A) is a group of related data points. B) displays data comparisons vertically in columns. C) is a numeric value within a range of data. D) is a numeric value that describes a single value on a chart.

To provide multiple video or audio sources for different browsers, _____.

A. use the preload attribute B. use the controls attribute C. use the autoplay attribute D. use the loop attribute E. use the poster attribute F. set up a source list using elements