Primary political powers rests with the government.
Option A.
<u>Explanation:</u>
Socialism is a political, social, economic philosophy. Socialist government is a form of government in which the means of production are owned by the government of the country.
Social systems in this form of government is the one which is divided in the market and the non market forms. The means of transportation is controlled by the government here.
The correct answer is option D. "Companies replaced hand-operated brakes with air brakes on trains". The development of air brakes on trains was a significant improvement of railroad safety. Air brakes function much more faster than hand-operated brakes, because hand-operated brakes required that the brakemen turned the brakes in one car and jump to the next to set the brakes on, and so on.
The huguenots (they arent part of christian faith)