What book ? if you send the book cover
gunpowder
The invention of gunpowder.
This period is also known as the medieval period and is known for the various discoveries and inventions made during this age.
First of all, Britain was the first to industrialize. Let that be known. But other than that, they industrialized because after the discovery of raw cotton in India, their output of cotton clothing did not match what the market wanted. So there was a race to see who could basically make cotton the fastest. Other than this, science of the enlightenment improved other aspects of city life and attracted more rural subjects to the cities.
Answer:
B. Unrestricted
Explanation:
The 1800s immigration policy was unrestricted because Americans encouraged relatively free and open immigration.