Here is my answer ................ the north seemed to gain most the balanced of the senate was now with the free states of slavery although cali sometimes voted with the south on some issues :)
Answer: The correct answer is : TEMPEST
Explanation: The United States government developed the TEMPEST regulations in the 50s and consists of a series of regulations to limit the electromagnetic radiation of electronic equipment, as well as data cables, network cables or monitors, data processing equipment, with the purpose of avoiding the theft of confidential data through the electromagnetic radiation that the hardware emits.
Your answer would be the Printing Press. It was invented by German Johannes Gutenberg.
Hope this helped.
