A Bar Chart Shows the Gross Annual Revenue, by Year

Multiple Choice

A bar chart shows the gross annual revenue, by year, of a Telecommunications company. Horizontal bars are shown for each of the four regions the company operates in, for the years 2019 and 2020. Year is shown on the X-axis of the chart. Bars of each region is given a separate color. Which gestalt principle helps the reader in interpreting this bar chart?

A) similarity
B) connection
C) closure
D) continuity