Monopolies
Stifling of competition
Selling inferior products
Controlling working and living conditions
I believe it is B or C. Though I am leaning toward C I would maybe look it up as well.
It was "C. 1932" that saw that highest world unemployment rate during the Great Depression, since this was when the true effects of the Great Crash of 1929 came into full effect.
A rate allows us to compare two numbers or measurements and give them a value. This helps us in real life to make everyday activities simpler. For example: you have to take a photocopy as quickly as possible and you have two photocopiers. The first draws 10 copies per minute and the second only 5 copies per minute. Using the rates you can know that the first option in better because you will have the double of copies in the same time. Another example is a place where you get 2 pizzas for $10 and another where you get 1 for $8. The rates help you to know that in the first place they give you 1 pizza for $5 (10÷2=5) so it is a cheaper option.
Does the question you gave us a multiple choice question because I'm confused