Racist Beliefs Are Often Challenged by Research Evidence

Racist beliefs are often challenged by research evidence. Based on the example of Peter Sandiford, who studied IQ and race in 1920s Canada, what would one predict for researchers who find themselves in this situation?

A) They will repeat the research to see where they made their mistake.
B) They will ignore or explain away conclusions that challenge their beliefs.
C) They will seek out competing explanations to try to formulate a compromise.
D) They will change their beliefs to incorporate the new knowledge.