Which best explains how railroad companies were able to standardize their timetables in 1883?
a. by combining into a single railway company
b. by working together voluntarily
c. by unionizing their labor forces
d. by complying with federal legislation

i confess that there are several parts of this constitution which i do not at present approve, but i am not sure i shall never approve them: for having lived long, i have experienced many instances of being obliged by better information or fuller consideration, to change opinions even on important subjects, which i once thought right, but found to be otherwise. it is therefore that the older i grow, the more apt i am to doubt my own judgment, and to pay more respect to the judgment of others.

we need the map to answer the question