How the expansion of railroads was is south carolina different when compared to the expansion of rail throughout the united states.

a. in south carolina, standard time was introduced as a component of railroad expansion; in the rest of the country, the introduction of standard time was delayed until war world 2
b. railway expansion in south carolina was slow due to the destruction of the civil war; railroad expansion in other areas was quicker because the railways escaped damage during the war.
c. nationwide, railroad expansion concentrated on the introduction of iron rails to improve the introduction of iron rails to improve the system; in south carolina, steel rails were used almost exclusively, though inferior.
d. south carolina deferred railroad expansion in favor of an intrastate highway system; other parts of the country concentrated on rail expansion to connect distant regions of the nation.