Who are the main authors who talk about identity in psychology?

Social Identity Theory by Tajfel, Turner

Explanation:

Social identity theory proposes that a person's sense of who they are depends on the groups to which they belong

the correct answer is ) possibility.

demonstrating opportunity cost is done through production possibility.

the opportunity cost can be demonstrated using the production possibility frontier or curve. this graphic shows the total number of possibilities for two products when we have the resources needed and used in an efficient manner. the main resources could be money, labor, and technology. the curve shows that the production of one good increases when the production of the othe

it would be d). more resources must be obtained to attain that combination of goods and services