The correct option is ,converse alternate exterior angles theorem.
we have given that,the information in the diagram,
The converse alternate exterior angles theorem justifies why lines j and k must be parallel.
What is the exterior angle theorem?
If two lines and a transversal form alternate exterior angles that are congruent, then the two lines are parallel.
The converse alternate exterior angles theorem states that if two lines are cut by a transversal so that alternate exterior angles are congruent, then the lines are parallel.
Therefore,the option d is correct.
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