Final answer:
The quantity and quality of labor, land, and natural resources of a country are known as its 'factors of production', which are the resources needed to produce goods and services.
Step-by-step explanation:
The quantity and quality of labor, land, and natural resources of a country are known as its factors of production. These are the essential inputs required to produce goods and services. Factors of production include land, which refers to the natural resources, labor, which embodies the human workforce, and capital, which comprises the tools, equipment, machinery, and factories used in the production process. Lastly, entrepreneurs combine these resources to create goods and services.
Therefore, the correct answer to your question is 'd. factors of production'. While capital and human capital are important components, they do not encompass the broad range of resources like labor, land, and natural resources that the term 'factors of production' does.