(mc) which of these technologies was able to spread because of the growth of american railroad networks

The technology that was able to spread because of the growth of American railroad networks was the internal combustion engine. This is a heat engine that generates the combustion process in a chamber. The internal combustion engine makes cars, vehicles, and buses work

Explanation:

the ss was the main organization responsible for the genocidal murder of around six million people of european ethnic minorities, essentially jews, in the holocaust. the members of all its branches committed war crimes and crimes against humanity during the second world war (1939-1945). likewise, the ss were involved in commercial enterprises and exploited the inmates of the concentration camps as slave laborers.

the tortures and assassinations committed by the ss were the result of an ideology developed long before the armed conflict, this ideology was based on the racial supremacy of the germans over the rest.