Your answer would be Dialogue :)
The answer is c. A and B don't make any sense since they mean different things and also D is wrong because it doesn't meant the right thing so your best option is C. :)
Instead of “your” it should be “you’re”.
Question: The candidate informed his aide that he was leaving on the next plane
Answer: There is not enough information to answer this question.
Have a great day/night
~Kenzie~