C. 50
Step-by-step explanation:
So, when two lines intersect like this, the angles across from one another will be the same. For example:
130 degrees for angle COD
130 degrees for angle AOB
This means that 3x - 35 = 130
So, x is equal to 55
Now remember that the angle measure of a straight line is 180 degrees
so, angle AOC is equal to 180 - 130 = 50
Angle BOD is also 50 degrees