Final answer:
Hardin might object to Zapiro's cartoon because it could underrepresent environmental considerations in economic matters, reflecting option B and possibly D.
Step-by-step explanation:
In assessing possible objections to Zapiro's cartoon on the World Economic Forum from the perspective of Hardin or similar thinkers, it seems that the critique might be directed towards the stance on economic issues. Contrasting Hardin's environmental ethics with Zapiro's presumably economic-centric viewpoint highlights potential discord. Hardin, based on Baxter's anthropocentric environmental ethic presented in "People or Penguins: The Case for Optimal Pollution" (1974), might find Zapiro's approach insufficiently attentive to moral responsibility concerning the nonhuman world. The cartoon's focus on the World Economic Forum, characterized by discussions on international economics and business, may fail to adequately address the environmental ethic that emphasizes a balance between human interests and the natural world. Hence, option B and potentially D could be the ways in which Hardin objects to Zapiro's argument, if the cartoon is perceived to marginalize the importance of environmental considerations in economic discourse.