Question

both state and federal government have the power to
○ build roads and enforce laws.
○ make treaties and collect taxes.
○ make treaties and declare war.
○ build roads and make treaties.

Explanation:

• Building roads: Both state and federal governments can engage in infrastructure - building like road - building. States build and maintain state - level roads, and the federal government can build and fund major highways.
• Enforcing laws: State governments enforce state laws, and the federal government enforces federal laws.
• Making treaties: This is a power exclusive to the federal government as it pertains to international relations.
• Declaring war: This is also an exclusive federal power.

Answer:

build roads and enforce laws.