Figure 212 : the Above Figure Shows the Lorenz Curves

Figure 21.2 : The above figure shows the Lorenz curves for Urbania and Ruratania.
-Refer to Figure 21.2. If area A = 2,000, area B = 400, and area C = 2,600, what is the Gini coefficient for Urbania (rounded to two decimal places) ?

A) 0.40
B) 0.43
C) 0.67
D) 0.77