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.
Answer:
according to the article, ”Excerpted from Back of History”, by William Howells, he stated that agriculture was one of greatest discoveries Jared Diamond believes that agriculture was a mistake for mankind because “Agriculture came the gross social and sexual inequalities the disease and the despotism, that cursed our existence.”
Explanation:
hopefully this helps I'm so sorry I tried
Trade: Malaysia and Indonesia
Trade: Sub-Saharan Africa
