Answer: D. I, II, and III
Explanation:
If expecting a price deduction, you can buy Put options. These give you the right to sell an underlying stock at a certain price regardless of what the price in the market is. If you purchased this, you can sell your stock above market value if it does go down. 
You can sell write call options for a fee where you give the buyer the right to buy your shares at a certain price in future. This is only valuable if prices rise so as you are expecting prices to fall, you could make a premium on the call option contract fees if prices fall without having to sell off your shares. 
Hedging with puts is better than short calls if you are expecting a major stock price decline as the opportunity for profit is higher. 
 
        
             
        
        
        
Specialization involves division of an organization's work and applies motivational theories to jobs to increase satisfaction and performance."
        
             
        
        
        
The correct answer is B.) The problem of scarcity does not exist.
Because since it is a 'perfectly competitive' market then scarcity shouldnt exist.
-Autumn Leaves
 
        
             
        
        
        
The unemployment rate in this population is 12%
First of all we have to find the total labour force in this country
Children less than 18 + people in the military + people in jail + retirees + marginally attached workers + full time students
= 50million + 15million + 30 million + 10 million + 30 million + 20
= 155 million
Labor force = 280million - 155 million
= 125 million
In this population those working full time and part time are the number of those that are employed.
= 30 million + 80 million
= 110 million
The unemployed = 125 million - 110 million
= 15million
The unemployment rate = 

= 0.12
The unemployment rate = 12%
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Answer:
Lucky event 
Explanation:
In the investments market a true measure of market efficiency is to get a track record of positive outcome from investors over time.
The lucky event problem occurs when an investor makes a profit on investment not because of how efficient a market is or by a logical procedure, but rather by chance.
In the given scenario Keyes put all his money in one stock that doubled in 3 months.
However this was not replicated among other investors who made similar vets on other stocks and lost.
This is an exams of lucky event problem in determining market efficiency.