​In the following question, an idiomatic expression or proverb is highlighted. Select the alternative that best describes its use in the sentence. He used to live a very disorganized life, but later we realized that there was a method in his madness.

• A. You have to be crazy to innovate new things
• B. An innovative idea is just a crazy man's fantasy in the beginning
• C. There’s a reason behind someone’s strange behavior
• D. You must be impractical to have new ideas
• E. You must not go by the rules in you want to invent something