I believe the answer is: B.migrant workers.
At that time, the migrant workers was forced to live under a horrible condition since there was no laws that regulate company's treatment toward of its employees. Due to the plight of these workers, united farm workers was created in order to create better situation for the migrant workers.
Answer:
Correct answer is B) Between the Gulf of Mexico and British-owned Canada.
Explanation:
A is not correct as the southwestern United States are along Pacific Ocean , and this was not a part of the purchase.
B is correct as this was a vast portion of land, that is mostly spreading throughout middle part of US, from Gulf of Mexico to Canadian border.
C is not correct as this part came into possession of the States much later.
D is not correct as eastern part was in the United States since the creation of the country.
