Which Statement Regarding Population Growth Is True

Which statement regarding population growth is true?

A) From 1950-2010, the over-65 population in the United States decreased.
B) From 1950-2010, the over-65 population in the United States has grown steadily.
C) From 1950-2010, the under-5 population in the United States increased.
D) By 2050, it is estimated that the over-85 population in United States will exceed 19 million.