Answer:
B) angles B and D are alternate interior angles .
Explanation:
Given : Lines DE and AB are parallel.
To find : Which angles represent alternate interior angles.
Solution : We have given
Lines DE and AB are parallel.
Traversal lines are BC and AC .
Alternate Interior Angles are a pair of angles on the inner side of each of those two lines but on opposite sides of the traversal.
Then angle D and B are alternate interior angles and E and A.
Therefore, B) angles B and D are alternate interior angles .