In a market with a downward-sloping demand curve and an upward-sloping supply curve, a law requiring sellers to pay the government a tax of $1.00 per pack on cigarettes has the effect of

a) shifting the demand curve to the left and increasing the price buyers pay by less than $1.00

b) shifting the supply curve to the left and increasing the price buyers pay by less than $1.00

c) shifting the demand curve to the right and increasing the price buyers pay by $1.00

d)shifting the supply curve to the right and increasing the price buyers pay by $1.00