Answer:
Britain was against communism, and the Soviet Union in Poland made the country a communist one. As well, they were losing trade with the country due to Soviet intervention in trades.
Yes, a nation can have a negative GDP.
Negative GDP is usually expressed as a negative percentage rate.
I'd say the combustion engine, even though it was toyed with in the mid-west during the cowboy era, it wasn't until after the Civil War in which it was a fully effective gasoline powered engine.
Answer:
Nobody hopes this helps :D
Explanation: