I think you forgot the options, but i can give you some information that might be useful: the two are independent, but still, the federal courts can decide whether the state courts took their decisions according to the constitution.
The desire for trade with Asia encouraged exploration of the Americas because in order to do so they had to search for a trade route. While doing so they landed in the Americas which was like unclaimed land to them so they explored it in order to gain it as their territory. The more land you had control over the more powerful the country was.
B at the start of a summary
A. Gross Domestic Product per capita.
Congress can come up with laws, and send them to the president for approval. If it is vetoed, there are ways that Congress can override that. That is how they share responsibilities, I hope this helps.