What is the ratio of the area of sector ABC to the area of sector DBE? A geometrical diagram of two arc circles and points marked respectively, A, B, C, and B, D, E. B is a common point of those. Angle beta degree marked at ABC, angle 3beta degree marked at EBD. 2r labeled on the BC line, and r labeled on the BD line. A. 4/3 B. 3/4 C. 2/3 D. 1/3 E. 1/4