Advantage(s) of the APT is(are) that the model provides specific guidance concerning the determination of the risk premiums on the factor portfolios. that the model does not require a specific benchmark market portfolio. that risk need not be considered. that the model provides specific guidance concerning the determination of the risk premiums on the factor portfolios and that the model does not require a specific benchmark market portfolio. that the model does not require a specific benchmark market portfolio and that risk need not be considered