Regarding real estate investments, risk that is associated

Regarding real estate investments, risk that is associated with the type of property and its location, design, lease structure, and so on can be thought of as:

(A)   Marketability risk
(B)   Liquidity risk
(C)   Business risk
(D)   Interest rate risk

Which of the following provides a measure of the extent to which returns tend to move together or have no relationships?

(A)   The coefficient of determination
(B)   The variance
(C)   The coefficient of variation
(D)   The covariance

Assume a portfolio is comprised of two securities, A and B, whose standard deviations are 0.0412 and 0.0721, respectively.  If their covariance is 0.002, what is their coefficient of correlation?

(A)   0.005
(B)   0.115
(C)   0.673
(D)   1.485