In the diagram above, points A, O, and B all lie on a diameter of the large circle, and D and d are the diameters of the

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In the diagram above, points A, O, and B all lie on a diameter of the large circle, and D and d are the diameters of the two smaller circles. If the sum of the areas of the two smaller circles is 5/8 of the large circle’s area, what is the ratio of D to d ?

A. 3:2
B. 5:3
C. 2:1
D. 3:1
E. 4:1


OA D

Source: Manhattan Prep