An investor who wishes to form a portfolio that lies to the right of the optimal risky portfolio on the Capital Allocation Line must:

invest only in risky securities.

such a portfolio cannot be formed.

lend some of her money at the risk-free rate and invest the remainder in the optimal risky portfolio.

both borrow some money at the risk-free rate and invest in the optimal risky portfolio and invest only in risky securities

borrow some money at the risk-free rate and invest in the optimal risky portfolio