What are some weaknesses of Marxist theory?

The major weakness of marxism is that it does not seem to work in the real world.This is because it does not not take into account the essential greediness and selfishness of the human being.Marxism relies on people to work hard just because they should and to forego the ability to get rich from their efforts.

what is the tax base for the sales tax?

it should be (usually ) 6%

even though you have attached neither the chart nor the generalizations, i have located them online. the right answer is d, since they are asking you about a generalization. you can only infer from the chart that between 2008 and 2009 the number of employed workers decreased significantly (from over 115 millions to 107 millions approximately), which signals some type of economic crisis.