Sachiko is framing the border of a square picture. If she knows the area of the picture, how could Sachiko determine the amount of framing material she needs to buy?
A. Divide the area by 2, and then multiply the quotient by 4.
B. Set the area equal to x2, solve for x, and then multiply the value of x by 4.
C. Set the area equal to x3, and then solve for x.
D. Set the area equal to x2, solve for x, and then divide the value of x by 4.