What can cause a production possibilities curve to move to the right?

an epidemic kills thousands of young men and women

thousands of people move out of the country

the population is growing increasingly old

a new invention lowers the cost of production

The controlled use of fire by hominids: (a) limited the expansion of hominids into certain environments, such as dry grasslands. (b) decreased the amount of food energy available in the hominid diet. (c) contributed to geographical expansion and food production techniques in positive ways. (d) has been shown to contribute little to the digestive process of hominids.

Personal finance skills have the most significant impact on an individual’s

What was the result of president taft's "dollar diplomacy