Answer:
1)an essay on the Industrial Revolution written by a historian
2)an original photograph taken at an Industrial Revolution-era factory
3)Da textbook covering factory practices during the Industrial Revolution
4)the journal of a factory worker who worked during the Industrial Revolution
Explanation:
All of the above the rest were good sources however they werent primary
a is the answer to this question and if I am wrong I am so sorry
It would be "D. Liberalism" because Liberalism is another way of liberating or setting free someone/something from the restraints of a higher power