How did the united states acquire alaska

Which of the following arguments did thomas paine include in common sense

Why did many americans want the united states to cuba gain independence from spain? cuba was rich in natural resources, including gold and oil. cuba would provide access to the pacific ocean through a narrow strait. the united states had strong economic ties to cuba. the majority of cubans expressed interest in becom ing a us state.

What does it mean to say the united states has a federal system of government