Answer is D) all natural resources ;)
Explanation: Economists traditionally divide the factors of production into four categories: land, labor, capital, and entrepreneurship. Land refers to natural resources, labor refers to work effort, and capital is anything made that is used to make something else.
This simply suggests that the presidency is becoming more active when it comes to issuing commands to the government. This also most likely means that the president will be having a wider scope of authority of more sectors in the government which points out to the president having more say.
If nations work together, they can effectively fight humankind's common enemies.