I’m so sorry for the horrible comment on here !! I’m not sure but check google honey
The government passed the Pacific Railway Act in 1862.
In this, they allowed the construction of a transcontinental railroad. They had participation in 4 of 5 transcontinental railroads.
Answer: The correct answer is : The Constitution requires the National Government to "guarantee to every State in this Union a Republican Form of Government."
Explanation: The National Government is also required to provide defense of the States from foreign invasion. The National Government is constitutionally bound to respect the territorial integrity of each of the States.