Answer:
a preliminary or preparatory statement; an introduction.
Explanation:
the introductory part of a statute or deed, stating its purpose, aims, and justification.
The main way in which the railroads contributed to the end of the large buffalo herds was that "The railroad tracks were obstacles that the buffalo would not cross". It sounds silly, but the buffalo actually refused to cross the tracks for reasons that are still misunderstood.<span />
The answer would be A) They wanted a strong central government
