Hello everyone, can someone explain why the right answer is D and not B? How come they needed a Court house in those 10 years, seems to me like that was not in dispute?

Hello everyone I'm not sure why the right answer to this question is C instead of B?

Why is the answer to this question C and not B?

Admin Note: Edited title. Please use the format: "PT#.S#.Q# - brief description of the question"