Help! I think im overthinking this ; (

I would say C

Step-by-step explanation:

There is no concrete numbers to determine that the sides are the same. However, they are both right triangles with 90 degree angles. They also have vertical angles, which are always congruent. Therefore your answer would be C.

AA

Step-by-step explanation:

∠ACB = ∠ECD

Reason : -

∠ACB & ∠ECD are vertically opposite angles.

This is related to Angle ( A )

∟BAC = ∟DEC

Reason : -

∟ACB & ∟DEC are right angles ( 90° )

This is also to Angle ( A ).

So,

Answer is AA.