The correct option is D A-A-S congruency
In ΔDEF and ΔRTX,
∠D = ∠R
∠E = ∠T
DF = RX = 7 in
∴ΔDEF≅ΔRTX by A-A-S congruency.
If two angles and a side of one triangle are congruent to two angles and a side of another triangle, then the two triangles are congruent by A-A-S congruency.