Canada exports two-thirds of its oil to the United States
People can see a difference in their area
B is the correct answer .
Answer:
In the United States before 1865, a slave state was a state in which the slave trade was legal, while a free state was one in which it was not. There were some enslaved persons in most free states in the 1840 census, and the Fugitive Slave Act of 1850 specifically stated that an enslaved person remained enslaved even when she or he fled to a free state.
Explanation:
