I think they were protected by invaders
I found this to explain so much. However the answer you're looking for is. preconscious
The answer would be Greece (a)
Answer:
Provided tremendous stimulus to American manufacturing. It encouraged American manufacturers to produce goods previously imported from overseas. By 1816, 100,000 factory workers, two-thirds of them women and children, produced more than $40 million worth of manufactured goods a year.
Explanation: