In the discussion of the Ultimatum Game, what is the significance of the statement that "the range of players remained limited" (paragraph 4)?
A.The limited sample did not allow the experimenters to generalize about all people.
B.Limiting the range of players allowed the experimenters to better control the outcome of the game.
C.Limitations on the game led to mistaken conclusions by experimenters at that time.
D.The limited sample allowed the experimenters to better control the range of variables in the experiment.
