The Figure Given Below Represents an Imperfectly Competitive Resource Market

The figure given below represents an imperfectly competitive resource market. Here common land (and not land used for specific purpose) is under consideration.Figure 18.1

-Empirical observations validate that the Gini co-efficient for the U.S. economy was between 0.35 and 0.37 until the 1990s, after which it has increased and reached 0.469 in 2009. Which of the following can be inferred from this?

A) The distribution of national income in the U.S. has become slightly more equal since the 1990s.
B) The government spending on poverty alleviation has increased since 1990.
C) More jobs have been created in the U.S. since 1990.
D) The distribution of national income in the U.S. has become slightly more unequal since the 1990s.
E) The government has replaced the existing regressive tax structure with a progressive tax structure.