Which chart type would best illustrate the contribution of three products to total company sales for a given year?

A gyroscope is

A) A child's game invented to check a child's balance B) A device placed in a mobile phone and tablet for balance C) A tool used to measure and maintain orientation D) A device to keep the concept of geotracking in balance

Researchers have found that adding such graphics as tables, charts, graphs, and maps increases retention by more than ____ percent.

A. 20 B. 40 C. 60 D. 50