Sorry, I'm late to the party yet again, and I think
VeritasKarishma already covered this really, really nicely. But just in case my two cents help somebody...
sayan640
VeritasKarishma GMATNinjaIn question 3 , why is option D incorrect and option B the correct answer ?
Question #3 asks which answer choice would likely be put forward by the "sociological economists" discussed in the passage. In the last paragraph, we learn that these economists "tend to view all human behaviors as directed primarily by the principle of maximizing
economic gain." This is contrasted with Zizeler's view, which emphasizes instead "the power of
social values to transform price."
Let's first take a look at answer choice (B):
Quote:
(B) The cash value of children rose during the nineteenth century because their expected earnings over the course of a lifetime increased greatly.
This answer choice directly ties the rising cash value of children to the "principle of maximizing economic gain." As their expected lifetime earnings increase, so does their cash value. This purely economic view of the value of children is right in line with the beliefs of the sociological economists. (B) is the correct answer.
Now look at (D):
Quote:
(D) The cash value of children rose during the nineteenth century because compulsory education laws reduced the supply, and thus raised the costs, of available child labor.
On a surface level, this answer choice also seems to emphasize economic factors to explain the increase in the value of children -- supply of child labor decreased, so the cost of that labor increased.
However, (D) identifies another factor as the root cause of this economic situation: "compulsory education laws." Remember, sociological economists believe that
all human behavior tends to be directed by the desire to maximize economic gain. So, from their perspective, the "compulsory education laws" must also have been put into place in order to maximize economic gain! There is just no evidence to suggest that this is true -- if anything, it is more likely that these laws were a result of changing social values, which in turn would increase the price of the remaining available child labor. This is more in line with Zelizer's argument
against the sociological economists' views. (D) is out.
I hope that helps!