Strategic alliances: A.) are a proven means of reducing the costs of performing value chain activities. B.) are collaborative formal arrangements where two or more companies join forces and agree to work cooperatively toward some strategically relevant objective. C.) are best used to insulate a company from the impact of the five competitive forces. D.) are the cheapest means of developing new technologies and getting new products to market quickly. E.) help insulate a firm from the adverse impacts of industry Which answer is it? Please reply ASAP!