C. Taking your competition seriously.
Answer: Option (a) is correct.
Explanation:
Income elasticity of demand measures the responsiveness of quantity demanded with change in the income level of an individual.

Income of an individual has a positive relationship with the demand for normal goods and has a negative relationship with the demand for inferior goods.
The appropriate response is a Horizontal merger. An even merger is a merger or business union that happens between firms that work in a similar space, as rivalry has a tendency to be higher and the cooperative energies and potential picks up in piece of the pie are considerably more prominent for consolidating firms in such an industry.
Answer:
The correct answer is to put the two variables in the same type of measure.
Explanation:
To begin with, in order to compare to different variables that are in different measures the correct way to proceed is to put them in the same measure so therefore they will be comparable with each other. Once said that, in this case the person should put the psychological benefits in economics benefits as it is the other variable and in order to do that the person should think of what aspects of his productivity would increase if he takes the vacations and gains the psychological benefits. For example, after getting back from the holidays he may feel himself less stress and more relax and therefore that he may be able to either do more job, more studies or more excercises and all that can impact in an economic way.
D. Stick to established rules whenever possible; avoid negotiation.
This is the best choice because you are still being caring and kind; which a student needs, but you are also showing who's in charge. This will cause the students to have more respect for you.