I believe the answer is: hindsight bias
Hindisight bias refers to mindset that make a person beleive that a certain event is predictable even if they have no objective measurement to make the prediction. Hindisight bias generally created by either memory distortion or self fulfilling prophecies.
A primary source is a source that was created by a person who was there to witness it. So, the answer would be A, a document made by someone who actually saw an event. In other words, the document was written by someone who was there to witness the event.
Answer: By humans industrial revolution.