Stocks A, B, and C have the same expected return and standarddeviation. The following table shows the correlations between thereturns of these stocks.

StockA StockB StockC

StockA 1

StockB 0.9 1

StockC 0.1 -0.4 1

Given these correlations, the portfolio constructed fromthese stocks having the lowest risk is a portfolio:

a. Equally invested in stocks A and B

b. Equally invested in stocks A and C

c. Equally invested in stocks B and C

d. Total invested in stock C.

The answer is c. Can someone show me the calculations?