Determine the missing reason in the fifth line of the following proof. a. vertical angles are congruent. b. converse of the alternate interior angles theorem c. corresponding angles postulate d. converse of the corresponding angles postulate

The question is kind of confusing. if it's asking how many variations of answers can you give. then do 4^5 for your answer.this would be something like the first question could be a and the 2nd c or first b next c etc. if you can, ask the teacher for a better confirmation of what it's asking. if i'm assuming correctly what it's asking, it's 625 different variations.