Communism, at the time, was the main priority of many nations. They didn’t want it to spread.
They had their own strategies and it would be foolish to think that they didn't have thier own desires and knowledge. They were choosing the European powers which they thought would serve their cause, that is why some supported one European power and the others supported another European power. Their role was great because they knew the ground well.
The Answer Is:
(A.) "Their success encouraged people to experiment and invent new products"
The main industry would be St. Petersburg
