Usually the minimum is typically 3 different sources .
the answer is a simple complement
Answer: C. His reputation for clever dealing betrays him when he tells the truth.
The statement in letter c shows irony because it presents contrasting events. Mr. Hauchecorne is a clever person however the irony strikes on him when nobody believes him and makes fun of his cleverness when he said the truth about the string.
This is a great start but add more detail, for example: You should go to Disneyland for your next holiday because of the great service. All the employees are super nice and the characters are super friendly. (**elaborate**)