After Studying 10,000 People at the 1884 International Exposition in London

After studying 10,000 people at the 1884 International Exposition in London, Galton concluded that:

A) social class defines intelligence
B) performance on elementary tasks does not correlate with anything, including social class
C) intelligence, while being difficult to define, can be objectively and scientifically measured
D) intelligence is to a great extent influenced by the amount of wealth that has been accumulated, according to the layperson