One participant leaves the room, and the remaining participants choose an object in the room. The instructor has a few words with the one outside, who will return and know the object chosen. The participants choose a map. The participant comes in and is asked to identify the object that his colleagues chose. I will not give you any other indication, therefore you should all pay attention.
B is correct.
That is psychology. This is how we can predict behavior. In conflict resolution it is necessary to predict behavior . In Exercise 1 above, I made an agreement with your colleague that the object you choose would be the third object I would name after naming a white object. We agreed on a system, without which he could not have predicted the correct selection.