Car Company A is more consistent, because the range of highway fuel efficiency of its cars is lower than that of Car Company B.
Car Company A has a range of 8 mpg (36 - 28 = 8), while Car Company B has a range of 15 mpg (40 - 25 = 15). A smaller range indicates that the data points are closer together, making Car Company A more consistent in highway fuel efficiency compared to Car Company B.