A) A portfolio to the left of the efficient frontier is not attainable, while a portfolio to the right of the efficient frontier is inefficient.
 
B) The efficient frontier represents the set of portfolios that has the minimum level of risk for every level of return.
 
C) The efficient frontier line bends backwards due to less than perfect correlation between assets
 
D) The slope of the efficient frontier increases steadily as one moves up the curve.
 
D) is wrong. 
 
This statement should read, "The slope of the efficient frontier decreases steadily as one moves up the curve." The other statements are true.

 
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