Choice A is the best answer. In lines 57-59("Many...coffee"), the author states that "Many moral dilemmas arise when these three versions pull in different directions but clashes are not inevitable." In this context, the three different perspectives on ethical economics may "clash," or conflict, with one another.
Choices B, C, and D are incorrect because in this context "clashes" does not mean mismatches, collisions, or brawls.