Question

After Pennsylvania experienced its oil boom in 1859, three other states discovered vast oil reserves. Name two of these states.

Answer 1

After the oil boom that happened in Pennsylvania during 1859. 3 other states started to discovered vast oil reserved in their country.
=> 2 of these countries are California and Texas.
=> For Texas, it was a great opportunity to be able to discover vast oil reserves for their country because it helped a lot with their economic growth. During 1940, Texas was already considered as the one of the biggest oil producing state.
Later they were joined by Kansas, Oklahoma and Illinois.

Answer 2

Two of those states were Texas, and California. A few other states also discovered oil, such as Kansas, Ohio, and Oklahoma.

Hope that helped :)