Usually enzyme inhibitors slow down the enzymes activity, so in this case, I would put D.
        
             
        
        
        
Risk arbitrage also called merger arbitrage trading; it refers to an event mediated hypothetical trading method. It tries to produce profits by taking a long position in the stock of a target company, and optionally merging it with a brief position in stock of an attaining company to produce a verge.
Riskless arbitrage includes taking merit of interest rate differentials by involving in a spot transaction today to sell/buy foreign currency, and at the same time involving in a purchase/sale of foreign currency for a particular time in the future.
 
        
             
        
        
        
A repeated series of independent experiments where there is only two possible outcomes (Normally called "Success" or "Failure") 
Examples: When you flip a coin. Out comes: head or tails
Hope it helped :) Sorry if it was to late  
        
             
        
        
        
Competition is the interaction in which both are harmed....
        
                    
             
        
        
        
Answer:
It would be the cell theory