B seems like the best choice.
Answer:
500 miles
Explanation:
because he never completed his railroad
Answer:
The main message was that the United states wouldn't interfere with any European affairs, and that the western hemisphere would be closed to European expansion.
Explanation:
This is because under the Monroe administration, they promised to stay out of European wars and affairs, and it was important for the still developing United States to strengthen it's army as well as it's economy.
