Answer is B, the railroad system going through the cities.
Advantages: Indians know that land like the back of their hand. They know all the farming and hunting techniques. Some settlers actually depended on the help of the Indians in order for them to survive
Disadvantages: Settlers had guns giving them an upper hand if they fought.
D. All of the choices are correct
Is this multiple choice? If not, i'd say that it is important for a historian to be sure of the authenticity of a primary source because a primary source needs to be proven to be accurate. It is important to study and make sure the source is authentic because the accuracy must be proven
<span>This reflects people only thinking about themselves rather than the country. Once people forsake the needs of their own country for individual interests, the country is lost and democracy does not make the country strong.</span>