Which of the following best describes the relationship of the second paragraph to the first paragraph?

The primary purpose of the passage is to

Which of the following statements best characterizes the relationship between traditional social science models of class and Ryan's model, as described in the passage?

It can be inferred from the passage that the most recent feminist social science research on women and class seeks to do which of the following?

The primary purpose of the passage is to

Which of the following, if true, would seriously undermine the validity of the conclusions drawn from the experiment described in the last paragraph of the passage?

According to the passage, the growth of algae was considered a threat to the success of the artificial pond near the Dead Sea because the algae

It can be inferred from the passage that which of the following is true about the salinity and temperatures of the highest and lowest water layers in a typical solar pond?

The primary purpose of the passage is to

The passage is primarily concerned with