A major reason was that he wanted them gone from the land and they didn't want to move. He believed that the US had to go westwards while the Natives didn't want to go away from their land. This is after he signed the Indian Removal Act. Cherokee were one of the tribes that didn't want to relocate, and what happened later is history.
The correct answer is A) The desire of antislavery forces to gain a new state for their cause.
The quick formation of an effective government in California was essential because of the desire of antislavery forces to gain a new state for their cause.
We are talking about the moment in history when California was accepted as part of the Union after the United States acquired a big portion of the former Mexican territory after winning the Mexican-American War
The admission of California as a free state threatened to upset the balance of power and violate the Missouri compromise.
In a time where northerners and southerners fought for power and control, California was admitted to the Union as a free state on September 9, 1850. More differences were generated between both sides regarding slavery. Let's not forget that the Missouri Compromise of 1820, had created legislation that admitted Missouri as a slave state but also admitted Main as a free state, in order to balance powers.
The Mexican people finally had a strong leader so their confidence increased
Alfred Thayer Mahan was a United States naval officer, historian, and one of the most influential American authors of the nineteenth century.
He argued that modern navies needed repair and coaling stations, which would not be dependable if controlled by other nations. This reasoning implied a justification for American acquisition of colonies to develop port facilities throughout the world.