Suppose There Is Currently a Tax of $50 Per Ticket

Suppose there is currently a tax of $50 per ticket on airline tickets.The supply curve for airline tickets slopes upward and the demand curve for airline tickets slopes downward.Sellers of tickets are required to pay the tax to the government.If the tax is reduced from $50 per ticket to $30 per ticket,then

A) the demand curve will shift upward by $20 and the price paid by buyers will decrease, but the decrease will be less than $20.
B) the demand curve will shift upward by more than $20 and the price paid by buyers will decrease by $20.
C) the supply curve will shift downward by $20 and the price paid by buyers will decrease, but the decrease will be less than $20.
D) the supply curve will shift downward by more than $20 and the effective price received by sellers will increase by $20.