There is no universally superior strategy for all firms. A firm's ability to leverage a chosen strategy effectively is largely contingent on their internal resources and capabilities as well as the nature of the external environment. When comparing varying degrees of diversification within a corporate level strategy, (1) what are some of the strengths and weaknesses associated with both (a) low and (b) high levels of diversification? Furthermore, (2) what level of diversification tends to yield higher returns on average, and why