One of the purposes of studying economics is to understand the a. reasons people purchase certain goods. b. reasons some resources become scarce. c. principles that explain why produces buy goods and services. d. principles that influence the production of goods and services.

The correct answer is letter D.

Studying economics brings to the student the understanding of what influences producers to actually produce certain goods and offer certain services. For example, there's something called "Factors of production" which explains the inputs put in the production of goods and services in order to make it profitable. The factors of production are: land, labor, capital and entrepreneurship.

interest groups send representatives to state capitals and to washington, d.c. to put pressure on members of congress and other policymakers. they engage in lobbying, or the organized process of influencing legislation or policy. lobbying can take many forms. interest groups can testify in congressional hearings.

"the attempts of the proletariat to rise above this abasement"