A. the empire was too large to keep united
Answer: negative reinforcement by escape
Explanation: Negative reinforcement occurs when a disliked or aversive stimulus is prevented or altered or stopped. The scenario above describes negative reinforcement by escape which means that an aversive, unwanted or disliked event is removed after it has occurred. Escape is a negative reinforcement and occurs when the aversive stimulus has occurred before being removed. In the context above, Tom was only able to prevent his loss after it has occurred, meaning an escape negative reinforcement.
The public approved of Martin Van Buren because he was sticking policies similar to Andrew Jackson, the previous president. Jackson also helped campaign Buren. Buren supported lower tariffs while his opponent, the Whig Party, did not. He also advocated free trade and set up system of bonds for the national debt.
There are many possible reasons but the two most common were christian missionaries who conducted religious missions all over the world in order to convert people, and the second being direct conquest like what Spaniards did in South American countries.
