Median Household Income in the United States Has Increased from $38,771

Median household income in the United States has increased from $38,771 in 1967 to $59,036 in 2016. Based only on this fact, we can conclude that

A) Inequality is increasing in the United States.
B) Inequality is decreasing in the United States.
C) Inequality is not changing in the United States.
D) We cannot conclude anything about inequality in the United States without more information.