I think it could possibly be d?
        
                    
             
        
        
        
It helps tell producers when a price is too high
        
             
        
        
        
Answer:
b) $1,950,000
Explanation:
Value of gift cards redeemed with those whose date of redemption has passed, will both have the amount to revenue out of $2,000,000 of the gift cards sold.
Total gift card revenue to be recognized in 2016 = $1,800,000 + $150,000
Total gift card revenue to be recognized in 2016 = $1,950,000
 
        
             
        
        
        
Answer:
C. Supply Curve 
Explanation:
Supply : Quantities sellers are able & willing to sell at a price , period . Determinants :  Price (price supply direct relationship - upward sloping curve) , Inputs Price , Other goods price , Technology , Govt Policy , Seasonal factors . 
Change in supply due to Price is 'Change in Quantity supplied' , leads  to movement along the curve . Change in Supply due to other factors is 'Change in Supply' & shifts the curve 
Damage of orange crop will decrease its supply & hence derived supply of its by product orange juice . 
Since the decrease in supply is due to other (seasonal) factor , it will shift the supply curve - decrease it & leftward shift . This supply deficiency leads to excess demand raising the equilibrium prices finally .