What steps should be taken to determine the authenticity of a primary source

What important waterway was controlled through the victory at fort crown point? the st. lawrence river the hudson river the great lakes lake champlain

The battle of sabine pass is important because? a) it was a stalemate between union and confederate armies. b) it resulted in the largest confederate casualty in the war. c) it marks the failed attempt of the union army to invade the confederate state of texas. d) it was won by the union soldiers and marked a turning point in the western front of the war.

An example of a policy to buttress one's position would be: the spanish granting large tracts of land in texas to american settlers the missouri compromise stephen austin settling in missouri