Answer:
equilibrium price would fall and equilibrium quantity would increase
Explanation:
The discovery would reduce the amount of crops now lost to frost damage and increase the supply of crops e.g. potato. 
As a result of the increase in supply, there would be an excess of supply over demand equilibrium price would fall and quantity would increase
Please check the attached image for a graph showing increase in supply 
 
        
             
        
        
        
I think the correct answer is A. Investors who buy preferred stock receive dividends after the common stock shareholders. Preferred stock is a stock type that gives right to the owner a fixed share of the company's profit or fixed dividend.
        
                    
             
        
        
        
a balance achieved between two desirable but incompatible features; a compromise.
"a trade-off between objectivity and relevance"