Answer:
ASA
C is correct
Explanation:
We are given table of congruence of triangle.
1. Given: DC || AB and AD|| BC
2. If two lines are parallel then a tranversal line makes eight angles.
∠2=∠3 and ∠1=∠4 ( Alternate interior angle )
3 . If one side is common in two figure then reflexive property use.
CA = CA (Reflexive )
If we take two triangles ΔDAC and ΔCAB are congruent by above property.
ΔDAC ≅ ΔCAB by two angle and one side.
The property of congruence is ASA
4. ΔDAC ≅ ΔCAB by ASA
Hence, The 4th reason is ASA