The given information is:
-Angle AOB=25°
-Angle BOC=27°
And in the given figure we can observe angle COD measures 25 °.
The definition of congruent angles is that these angles have the same measure.
So, angles AOB and COD are congruent, and the measure of the arcs is equal to the measure of the angles.
It means the congruent arcs are AB and CD.
Answer: option D.
