Answer:
A. costly.
Explanation:
The word marginal means costly in the field of economics. In general, the meaning of marginal is small, tiny and low. Marginal refers to the focus on the cost on the product or profit that is earned from selling of that product. Companies use marginal analysis as a tool in order to help them maximizing their profits so here in the sentence marginal refers to the cost.
Answer:
Covariation of cause and effect
Explanation:
According to my research on different causes of behavior, I can say that based on the information provided within the question the term that best exemplifies this is Covariation of cause and effect. This term refers to the process of establishing that there is a cause and effect to relationship between the variables. In this situation the cause would be reading more newspapers, and the effect would be that the students display more knowledge of current events.
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A. Byzantine Empire, this is the answer
