Julie wants to draw a triangle that is similar to a triangle on a coordinate plane. She chooses to draw a triangle with sides that are proportional to the original triangle. Which method could she use to draw a similar triangle?
 A. multiplying the x-values by 2 and the y-values by 2
 B. multiplying the x-values by 2 and the y-values by 3
 C. multiplying the y-values by 3
 D. multiplying the x-values by 3