In the figure below, point O is the midpoint of AE, and CO is perpendicular to AE . Suppose that the figure is first reflected across Co and then reflected across AE. The images of AO, BO, CO, DO and EO resulting from the 2 reflections are EO, BO, CO, DO and AO, respectively, forming a new figure that combines both the original and
its image. Which of the following pairs of angles must be vertical angles?
с
D
m
А
o
A. ZAOB and ZAOB
B. ZBOC and ZB'OC
CZCOA and ZCOA
O
DZCOD and ZC'OB
O E ZDOE and ZD'OE