56 People
Source: https://www.reference.com/history/many-men-signed-declaration-independence-6fce64817b4b9c01
The correct answer is A. Technological advances such as s<em>team power, air brakes, automatica lubricators and steel tracks</em> have affected the railroads very positively, since it has made it possible that the rail network could become a safer, more efficient and more reliable means of transportation for goods.
Pod people are not meant to represent Communists, secretly infiltrating American society because they do not foster communist goal and objective.
<h3>Who are communist?</h3>
Communist are individuals that practice communism, they do not allow for classes or groupings in a community rather foster togetherness among members of a community.
Secretly infiltrating American society with an alien ideology is not one of the objective of communist rather they want resources and properties to be equally distributed among the rich and poor to avoid classes.
Learn more on communism here,
brainly.com/question/1289991
The peloponn war lasted 27 years
