The Graph Shows Sales in Thousands of Dollars for 1989 $(x, y)$

The graph shows sales in thousands of dollars for 1989 and 1990. Use it to answer the question

-If the ordered pair $(x, y)$ represents a point on the graph, what does $x$ represent? What does $y$ represent?

A) $y$ represents the month; $x$ represents the sales in thousands of dollars.
B) $x$ represents the month; $y$ represents the sales in thousands of dollars.
C) $x$ represents the year 2006; y represents the sales in thousands of dollars
D) $x$ represents the year 2006; y represents the year 2007 .