Need asap by the late 1800s, economic arguments for imperialism had given way to other considerations. what were those considerations?

I believe it would be the industrial revolution.
Since the industrial revolutions, more job opportunities were opened up beside having to take care of noble's land in feudalistic system.
This shift the economy into a free market system where the majority of wealth fall to the hand of successful factory owners.

6, 4, 5, 1 are true. the others are false.