Its A. Anything concerning the Missiouri Comp is about the blance between slave and free states.
B the answer is "b" I remember learning this in class
More than anything, the Spanish were seeking wealth.
Christopher Columbus himself thought that he had reached India: he wanted the wealth from the trade with Indians.
In the beginning, the Spanish hoped for Gold and Silver, later also for other products that could be made cheaper in the New World.
In short: the Spanish were not interested in Mexico but in what the ships could bring from Mexico (again, mostly gold).
Some, very few Spaniards, who settled in the New World were too unhappy in Europe and hoped for a better life.
The Oregon Trail was part of the idea of Manifest Dynasty because, Manifest Dynasty was the idea that America should expand into the Western Territory. The Oregon Trail is people who are traveling from the East to the West, so it demonstrates Manifest Dynasty very strongly.