From 1860 to 1895, the United States experienced advances in technology, the industrial revolution and the Mexican-American war.
It can't be the Spanish American war because that didn't happen until some years later. It can't be an agrarian revolution because this is during the INDUSTRIAL Revolution and education at the time wasn't prioritized as much as it is today.
Technology can help government in handling many emergencies such as resource shortage, crop shortage, about natural and man-made calamities. Technology can be helpful in increasing the crop rate by using the high yielding seeds, new and improved irrigation sources.
Food is the major need for the survival and with the help of technology this shortage of food can be solved. Apart from this, technology can also be helpful to known about the calamities (natural or man-made) by the help of devices
"a. Immigration restrictions were expanded as fears of communist <span>infiltration from Soviet bloc nations spread" would be the best option from the list, since McCarthy instilled a feeling of paranoia about communism in the US.</span>
