Scenario 4 exemplifies a power that only state governments have, which is decreasing the percentage of income tax citizens have to pay on their income. This is because states have the authority to set income tax rates within their borders.
1. Increasing the number of soldiers in a foreign conflict is a power held by the federal government, not just state governments.
2. Decreasing the required sentences for nonviolent crimes is within the authority of both state and federal governments, depending on the specific laws and jurisdictions.
3. Increasing the amount of days citizens can go to the polls to vote can be regulated by both state and federal governments, but it may vary based on the election laws of each state.
Therefore, when looking at the options provided, decreasing the percentage of income tax citizens have to pay on their income is a power that only state governments have.
