well ...here is the answer
The United States Department of Homeland Security (DHS) is a federal agency designed to protect the United States against threats. Its wide-ranging duties include aviation security, border control, emergency response and cyber-security.
Pioneer settlers were sometimes pulled west because they wanted to make a better living. The biggest factor that pulled pioneers west was the opportunity to buy land.
Manifest destiny was caused by the fact that the American people were historically connected to English civilization, this gave them a sense of superiority over the other peoples who lived in North America. Because of the fact that they were white and civilized, the Americans felt superior to the Indians.
For me, both B and D make sense. Do you have any text I can read?
Hector is the answer.
hope it helps!
