Answer:
a) is less effective than a direct cash transfer to poorer nations.
Step-by-step explanation:
Posner and Sunstein affirm that the policies imposed on rich countries and especially the USA on combating climate change are not really beneficial policies. This is because he states that the USA, although it is largely responsible for the increase in climate change, is not one of the countries most affected by them, so it may seem unfavorable for the government to adopt changes that will promote a large expenditure of money, once that are not affected by the problem. However, the countries most affected are poor countries that, although they are most interested in changes, do not have the money to promote them. In that case, it would be more beneficial for rich countries, such as the United States, instead of promoting economic spending to lessen the impact on climate change, to donate money to affected poor countries, allowing them to use that money to promote beneficial changes in their region.