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

The answer would be B.

answer; /// i do believe that the correct answer is (a); a farming tribe that settled primarily along the mississippi and arkansas rivers;

the federal constitution of the united mexican states of 1824 was enacted on october 4 of 1824, after the overthrow of the mexican empire of agustin de iturbide. in the new constitution, the republic took the name of of united mexican states. it was replaced by the federal constitution of the united mexican states in 1857.