Choose 18 Which of the following statements is most correct? on Select one: a. The highest level of diversification is attainable if assets are perfectly positively correlated. But that is hard to find in practice. b. The highest level of diversification is attainable if assets are perfectly negatively correlated. That is, it is possible to reduce risk to zero. c The highest level of diversification is attainable if assets are perfectly positively correlated. That is, it is possible to reduce risk to zero. d. The highest level of diversification is attainable if assets are perfectly negatively correlated. But that is hard to find in practice. Finish attempt