They were accused of overproducing oil. Hope this Helps! :^)
Answer:
The invention of the printing press by Johannes Gutenberg.
Explanation:
The invention of the printing press by Johannes Gutenberg allowed new ideas to spread more quickly around Europe. The discovery of America by Columbus meant that new foods and medicines were brought back from the New World.
Soldiers also made dugouts and funk holes in the side of the trenches to give them some protection from the weather and enemy fire. The front-line trenches were also protected by barbed-wire entanglements and machine-gun posts. Short trenches called saps were dug from the front-trench into No-Man's Land.