Which one of the following could be an accurate matching of the types of bonds to the corporations that offer them?

When I look at the rules I don't see a reason to build a scenario. As I understand you build a scenario when: 1. one variable limited to 2 spaces 2. one space limited to 2 variables 3. a block limited to 2-4 spaces I am trying to stay consistent and follow a system. Can you please explain why this game builds scenarios? Am I not seeing a scenario condition in the rules?