Lines m and n are parallel lines cut by a transversal l.

Which answer gives statements that should be used to prove angles 1 and 7 are congruent?

Angles 7 and 8 form a linear pair; angles 8 and 4 are congruent as corresponding angles.

Angles 1 and 3 are congruent as vertical angles; angles 3 and 7 are congruent as corresponding angles.

Angles 1 and 3 are congruent as vertical angles; angles 3 and 6 form a linear pair.

Angles 1 and 2 form a linear pair; angles 2 and 6 are congruent as corresponding angles.