Answer: C angles at the intersection are congruent and supplementary
Step-by-step explanation:
Two right angles are 90° each. So they add up to 180° which makes them supplementary. Supplementary alone is not proof that they are perpendicular because there are many combinations that add to 180.
Congruent means they are identical, or equal in size.
Only two Right ( 90° ) angles meet those conditions.
