A large number of studies have been conducted on student test-taking behavior. The successful hypotheses from these studies has been compiled over several years from many different research teams. Researchers have developed a set of related concepts to explain these successful predictions, facts and findings from the compilation of studies. These concepts are used to generate testable predictions to continually test and refine or tweak these concepts. The set of related concepts is called a(n) .

The correct answer to this open question is the following.

Although you did not include the options, we can say the following.

The set of related concepts is called a theory.

This can be called a theory in that scholars and researchers have developed a set of related concepts that have served to explain these successful predictions, facts, and findings from the compilation of studies.

In scientific terms, a theory is a set of serious explanations about something or a phenomenon, but these explanations are well-substantiated, The explanation is the result of follow-through research that has resulted in the elaboration of hypothesis and facts. Scientists and researchers must test these theories once and twice to confirm the statements or renovate them accordingly.

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