Answer:
(B) I and II 
Explanation:
Price discrimination is when a producer charges different prices for his good or service. 
Third degree price discrimination is when consumers are charged different prices for the same good due to certain factors. E.g. age, gender, location.
Second degree price discrimination is when consumers who buy in bulk are given discounts. 
First price discrimination is when consumers are charged different prices according to their willingness to pay. Example of first price discrimination is initially charging high prices and then reducing the price over time to sell to the more price-sensitive consumers. 
I hope my answer helps you. 
 
        
             
        
        
        
False.
The business wants to upgrade the phone system, not rebuy the same one.
        
             
        
        
        
Answer:
Observational study
Explanation:
The appropriate study for a gas station owner who wants to find out whether customers are satisfied with the service they receive or not is "Observational Study."
Given that the Observational study is a type of research study or scientific investigation in which the researcher observes the effect of an action or activities such as risk factors, or outcomes without a direct impact on the intervention from the researcher.
In this case, the satisfaction of customers concerning the services they receive can only be observed by the researcher without influencing the services or how the customers perceived their level of satisfaction.
 
        
             
        
        
        
Answer:
A. Volatility
Explanation:
Volatility refers to high level of fluctuations with little or no consistency. It also refers to the variation in an activity with no constancy. 
In the given case, Andrew keeps on swapping jobs within a short duration of time, and in varied fields of little similarity. This conveys a high degree of volatility in Andrew's work habits since he is unable to stick to one job or a field of job.
The changes in his employment structure reveal a pattern of high level of deviations, fluctuations referred to as Volatility.