In what situation is a binary tree considered balanced?

Match the following terms to their meanings:

I. Chart II. Data point III. Data series IV. Category label V. Column chart A. displays data comparisons vertically in columns B. group of related data points C. numeric value that describes a single value on a chart D. visual representation of numerical data E. text that describes a collection of data points in a chart

Effective June 21, 2001, Section ____ of the federal Rehabilitation Act requires all U.S. federal government agencies, as well as public colleges and universities, to make their electronic and information technology accessible to people with disabilities.

A. 506 B. 507 C. 508 D. 907