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Which of the following statements is (are) correct?(x)A majoreconomic downturnis a source of systematic riskand the departure ofa firm's chief executive officer(CEO) is a source of unsystematicrisk.(y)During a recession, systematic risk will increase andunsystematic risk will decrease.(z)Adding more unrelated securitiesto a portfolio reduces unsystematic risk.A.(x), (y) and (z)B.(x) and (y) onlyC.(x) and (z) onlyD.(y) and (z) onlyE.(z) onlyWhich of the following statements is correct?A.The dollar return is a more useful measure to compareperformance than percentage return because it more accuratelyreflects the change in wealth of the investor.B.It is necessarily true that when an investment achieves a highreturn it is a risky investment.C.By adding stocks to your portfolio, it is possibletoeffectively eliminate nearly all of the market risk.D.A low standard deviation means that the investment is lesslikely to achieve high returns; which means that it is morerisky.E.None of these statements are correct