The main reason why this was the case is because Industrialization was an incredibly new phenomenon, and very few people could have predicted just how bad it was for the environment and for people's health.
The answer is C. Having a secondary source from a time that an event occurred can help historians recreate and study the event.
Hihi!
The impacts that glasnost and perestroika had on the Soviet was that the <span>Mikhail Gorbachev's policies of </span>glasnost<span> and </span>perestroika<span> had profound and unintended </span>effects<span> on the Soviet Union. In that matter, many historians suggest these reforms led directly to the fall of communism and the breakup of the Soviet Union! </span>
I hope I helped!
-Jailbaitasmr
