12.Which of the following statements is most correct?

A. Combining positively correlated assets having the same expected return results in a portfolio with the same level of expected return and a lower level of risk.

B. Combining negatively correlated assets having the same expected return results in a portfolio with the same level of expected return and a lower level of risk.

C. Combining positively correlated assets having the same expected return results in a portfolio with a lower level of expected return and a lower level of risk.

D. Combining negatively correlated assets having the same expected return results in a portfolio with a lower level of expected return and a lower level of risk.