The addition of a risky security to a fully diversified portfolio: a. may or may not affect the portfolio beta. b. will increase the unsystematic risk of the portfolio. c. must increase the portfolio beta. d. must decrease the portfolio's expected return. e. will have no effect on the portfolio beta or its expected return.

Anew joint command and control system is being developed to meet the strategic information needs of all the military services. the air force is the lead service, but the army and navy have different points of view about what functions the system should perform. which one of the software acquisition best practices would be most relevant in managing this issue as the program office undertakes system development?