Answer:
Diplomacy is the correct answer.
Step-by-step explanation:
The question refers to this excerpt:
The United States and China are the two largest consumers of energy in the world... Neither of us profits from a growing dependence on foreign oil, nor can we spare our people from the ravages of climate change unless we cooperate. Common sense calls upon us to act [together].
President Obama, 2009.
Diplomacy refers to the ability of handling international relationships between two countries in an effective way in order to improve those relationships. In this case, President Obama's speech is intended to show that the U.S. and China should work together against climate change.