An internet company's revenue, in millions of dollars, was recorded at different intervals for a ten-year period. The graph shows the relationship between the company's revenue and the time it was recorded. Which statement correctly describes a situation represented on the graph?
A.
Sections A and D represent a period when the company's revenue increased at a constant rate.
B.
Sections B and E represent a period when the company's revenue decreased at a varying rate.
C.
Section C represents a period when the company's revenue increased at a constant rate.
D.
Section E represents a period when the company's revenue decreased at a varying rate.

the answer is .
C.
Section C represents a period when the company's revenue increased at a constant rate.