The correct answer to this open question is the following.
Although you forgot to include the options for this question is the following.
Railroad companies hired expert managers to head specialized departments, a practice soon copied by other businesses.
And this represented a great decision to railroad companies in that people with the right kind of knowledge started to manage key departments successfully. They were the experts and had the experience to make the right decisions. They were si successful, that other companies realized the importance to have the right kind of people managing key areas of the organization.
This is because, the days of autocracy is over and there is a new era of democracy where each and everyone is allowed to speak out his or her opinion when it comes building up a government
The main problem that classical economics did not address that occurred in the Great Depression was "<span>How much the government should spend to revive the economy," which is still a source or major contention. </span>