A graph is a way to represent a lot of data in such a visual format. The correct option is C, he/she should use graph B.
What is a graph?
A graph is a way to represent a lot of data in such a visual format that it is easy for the user to understand the complete information in one go. Usually, the line of the graph is a function that follows the graph.
If an employee wants to request a raise, the graph he/she should use to support his or her case is graph B. Because that graph is showing all thought the company is earning good profit the salary of the employees is still reducing.
Hence, the correct option is C, he/she should use graph B.
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