What were the main changes observed in the Second Industrial Revolution? I - The use of coal as fuel was replaced by electricity and oil. II - The...

What were the main changes observed in the Second Industrial Revolution?

I - The use of coal as fuel was replaced by electricity and oil.
II - The expansion of railways allowed the transportation of raw materials and the buying and selling of products.
III - The development of the automobile industry created new types of transportation, such as cars and airplanes.
IV - The automation of actions in the industry, replacing physical and mental human energy with automated machines, characterized the Third Industrial Revolution.
a) Only I and II are correct.
b) Only II and III are correct.
c) Only III and IV are correct.
d) Only I, II and III are correct.
e) I, II, III and IV are correct.