Answer quick so I can study! two companies refine and sell natural gas within the same market. to limit supply of natural gas on the market and thereby raise prices, natural gas and olio energy agree to buy "excess" supplies from dealers and "dispose" of it. the natural gas and olio energy deal is

-per se violation of antitrust law

-subject to analysis under rule of reason

-legal restrain of trade

-a deal that neighter restrains trade nor harms competition