Answer:
d. Unlike monopolies and monopolistically competitive markets, oligopolies prices do not exceed their marginal revenues.
Explanation:
An oligopoly can be defined as a market formation where in a given sector of the economy there are only a small number of competing companies offering a product or service. Its structure is formed by imperfect competition (between monopoly and perfect competition).
 The difference between monopoly and oligopoly is that the number of companies that the market has will set the price of products in an oligopoly market, whereas in the monopoly only one company dominates the market and therefore that company determines the price of the good, as it is a market without competition. Therefore, alternative D is the incorrect one.
 
        
             
        
        
        
<span>A demand curve represents the relation between different prices of a commodity and its varying quantities purchased by people at different prices. As a general rule, the more the price, the less the demand. In the scenario described in the question, the demand curve shows the number of tickets that will be purchased at various prices. Ticket is the commodity here and the people who purchase the tickets represent demand.</span>
        
             
        
        
        
Answer: Extra safety that is applied to a project immediately before the use of the constrained resource.(D)
Explanation:
Drum buffer can be explained as period of time that is used to safeguard the drum resource from the problems that occur from the drum operation. 
The aim of the drum buffer effect is to provide a recheck of the work in order not to deviate from the real aim of the project. The buffer makes up for the process variation, and makes the project stable as it gives extra safety which is applied mmediately before using constrained resource.
 
        
             
        
        
        
The investment type that typically carries the least risk is saving account
        
             
        
        
        
<span>The greatest risk of insolvency</span> can be determined with a variety of factors.