Respuesta :
The answer is A because all of the other questions can be answered with yes or no, whereas A cannot. This makes it an example of an open-ended question.
Answer:
A. How did your ancestors get their covered wagons across the rivers?
This is open minded because you have to Think about an answer rather then just say either Yes, No, or Maybe, or even I Don't Know. Open minded means you need to think of your answer.