A manufacturer agrees to sell the distributor 1,000 boxes of 2-quart bowls only if he agrees to resell to the retailer at cost plus $1.10 per bowl and the retailer must agree to sell at no less than his cost plus .50 per bowl. This is:

	a.	vertical price fixing.
	b.	horizontal price fixing.
	c.	vertical market allocation.
	d.	a group boycott.