Answer:
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Since the triangles CAT and DOG overlap, their corresponding parts are congruent.
As we are looking for ASA congruency, we need to select two angles and the included side.
Let's review the given options, considering names of triangles and the order of vertices in those names.
A. ∠ A ≅ ∠ T
B. CA ≅ DO
C. AT ≅ OG
D. CT ≅ DG
E. ∠ A ≅ ∠ O
F. ∠ C ≅ ∠ D
So we have corresponding angles A and C and the included side must be AC.
Looking, at the options, we can get ASA with combination of options B, E and F.