Which technological improvement did the railroad bring?
greater productivity
o
faster transportation
o
reduction of human workload
improved communication

The technological improvement brought by the railroad is faster transportation.    

Explanation:

Railroad is a type of permanent road that are made of line of rails lying on a roadbed. The railroad was invented in September 1825. Railroad can be used for the operation of locomotives. Locomotives carry both goods and passengers on regular schedules.  

Railroad led the way for faster transportation. High-speed rail (HSR) is a type of rail transport that efficiently operates faster than bus or car. Railroad helps in quick and fast transportation of passengers and goods.

b) the confederacy had to pay all union war expenses.

your answer will most likely be a.