The correct option is C Lines 74400 - 32693 ("Take fair trade coffee (coffee that is sold with a certification that indicates the farmers and workers who produced it were paid a fair wage, for example: buying it might have good consequences, be virtuous, and also be the right way to act in a flawed market.")
Option C is the only example in the passage that illustrates that the three different approaches to ethical economics- Adam Smith's belief in consequences dictating actions, Aristotle's emphasis on character and finally, emphasis on the virtue of good actions themselves- can be applied to the example of fair trade coffee. This becomes the common ground. Also, "Common ground like this suggests that, even without agreement on where ethics applies, ethical economics is still" clearly supports option C. Options A, B and D are incorrect as they do not show that the three different approaches to ethical economics share common ground.