Petroleum refining, steel manufacturing, and electrical power
The correct answer is "D".
The industrial revolution which occurred in Great Britain in the second half of the 18t century brought a series of massive changes not only in the economy but also in society. The introduction of machines made it possible for less skilled workers such as women and children to work in the factories. This improved the overall economy of households, as more members were economically active.
Abolitionist John Brown leads a small group on a raid against a federal armory in Harpers Ferry, Virginia (now West Virginia), in an attempt to start an armed slave revolt and destroy the institution of slavery.
