When borrowing and lending at a risk$-$free rate are allowed, which capital allocation line $($CAL$)$ should the investor choose to combine with the efficient frontier? I$)$ The one that connects the individual stock with the highest expected return. II$)$ The one that will minimize risk. III$)$ The one with the steepest slope. IV$)$ The one intersecting the global minimum portfolio. A$.$ I and II B$.$ I and III C$.$ II and IV D$.$ III only E$.$ I, II$,$ and III