The Optimal Portfolio for an Individual Investor Is Represented by the Point

The optimal portfolio for an individual investor is represented by the point that lies on the

A) utility curve which is just tangent to the efficient frontier.
B) lowest possible utility curve and connects to the efficient frontier.
C) utility curve which represents the highest possible rate of return within the feasible set of risk- return options.
D) utility curve which is just tangent to the right side of the feasible set of risk- return options.