Answer:
a. Increase the direct costs of the state's debt.
Explanation:
When a bond's rating is downgraded is a signal to the investors that investing in the bond now is riskier than it was prior to the rating downgrade, hence, a perceived higher risk using the risk/return relationship means that the bond issue would have to offer a higher return to entice the investors to invest in the bonds.
As a result, the higher required rate of return translates into a higher direct cost of the state's debt since their interest rate offered has increased