To solve the problem we must know about bar charts.
Bar Chart
A bar chart is drawn to compare different groups.
The correct option is C.
Explanation
Given to us
- A bar chart for avg. annual job openings due to growth and net replacement needs.
Solution
As we can see in the image the difference between security guards and pharmacy technicians jobs is more than 20,000.
Looking at the options the option that is close to 20000, is 21000.
Hence, the correct option is C.
Learn more about Bar Chart:
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