Answer: c. To understand which variables are the cause and which variables are the effect of a phenomenon
Step-by-step explanation:
The options include:
a. To describe the characteristics of relevant groups, such as consumers, salespeople, organizations, or market areas
b. to determine the degree to which marketing variables are associated
c. to understand which variables are the cause and which variables are the effect of a phenomenon
d. to determine the perceptions of product.
Descriptive research simply refers to a research type that is used in the description of a population that the researcher is studying.
It simply answers questions such as when, what or how in the research. The subject of the research is being described here.
From the options given, we should note that the descriptive research isn't conducted to understand which variables are the cause and which variables are the effect of a phenomenon.