In the perfectly competitive model, thedemandcurve for the market ___________ and thedemandcurve for the individual producer ___________________.

answer choices:

a.Is a horizontal line; slopes downward and to the right.

b.Slopes downward and to the right; is a horizontal line.

c.Does not exist; slopes downward and to the right.

d.Slopes downward and to the right; slopes downward and to the right.

e.Is a horizontal line; is a horizontal line.