A Graph Shows the Price of a Pound of Cucumbers

A graph shows the price of a pound of cucumbers on the vertical axis and the quantity of new cars sold by Honda on the horizontal axis. The price of a pound of cucumbers remains constant as the quantity of new cars sold increases. The graph of these data is a

A) horizontal line.
B) positively sloped line.
C) negatively sloped line.
D) curve with a maximum.
E) vertical line.