Answer:
a and b are certainly correct and d is absolutely wrong.
The factor that was not a reason for settling the British Colonies was to find land and the opportunity to build a farm in a new part of the world.
Varied amounts is a good bet. You have a certain amount to pay for objects and bills also have amounts so is easier.
Durable is also good but money can be regained by the bank or job.
Portable is also good but in other times people paid with gold bars which were quiet heavy.
Limited Supply is not it because you need it. So factories keep on producing.
This is only true per square mile or square kilometer, but it's false generally (so I would say that the statement is false).
For example, Hong Kong and Macau have by far higher population density (with Macau said to have the biggest population density in the world) than mainland China, but Mainland China has a larger population.
unemployment rate is 3%
the labor force participation rate is 22%