The answer is "Irrelevant details are unrelated to the point the author is making"
Irrelevant means it doesn't support the argument, and a good reader should be able to distinguish between the two.
The prime minister is the leader of the party that wins the most seats in general
Things such as electricity, petroleum and steel. The revolution was possible due to the availability of natural resources (petroleum), strong government, transportation methods, power supplies, and a high amount of laborers.
Specific people involved are Andrew Carnegie who dominated the steel industry and owned J.P Morgan; Alexander Bell who created the telegraph. There's also John D. Rockefeller who greatly influenced the oil industry and Cornelius Vanderbilt who use railroads to connect major cities.
Hope I helped :)
The answer is richard nixon i believe.