Portfolio risk can be reduced by? Portfolio risk can be reduced by all of the following except? O a. Investing in foreign securities that has low correlation with the domestic security. O b. Investing in foreign securities that has high correlation with the domestic security. O c. Investing in foreign securities that has no correlation with the domestic security. O d. Investing only in the domestic security. a. Investing in foreign securities that has no correlation with the domestic security. O b. Investing only in the domestic security that has low correlation with each other. O c. Investing in foreign securities that has low correlation with the domestic security. O d. Investing in foreign securities that has high correlation with the domestic security