Regarding General Trends in IQ Scores in the United States

Multiple Choice

Regarding general trends in IQ scores in the United States, which of the following is TRUE?

A) IQ scores have been rising steadily, at about 15 points per decade, for several generations.
B) IQ scores have been falling steadily, at about 3 points per decade, for several generations.
C) IQ scores have been rising steadily, at about 3 points per decade, for several generations.
D) IQ scores have remained about the same over the past several decades.
E) IQ scores have been falling steadily, at about 15 points per decade, for several generations.