Answer:
A and C
Step-by-step explanation:
The easiest way to solve this is by drawing a new triangle, one where one leg is clearly longer than the other. This way, it is easy to see which angles match.
Or, using geometry, we can show that C = θ since they are alternate interior angles. Since C is complementary to the angle between the rays, and A is also complementary to the angle between the rays, then A = C, so A = θ.