Levin and co. is a group of oil refineries that has been in the news recently. the company had to stop production for over two weeks because their key supplier refused to sell them crude oil at the old prices. even after rounds of negotiations, the supplier refused to give in to the demands of levin and co. and finally, the company had to acquire the raw material from the same supplier because alternative suppliers, though abundant, could not provide the quantities the company demanded at such short notice. this shows the role of in increasing the power one enjoys. a) alternatives b) dependence c) abundance d) substitutability e) exchange