Which statement has the least support

A)  The average IQ in the lowest social classes is about 15 points lower than the average IQ in the highest social classes. 
B)  Genetic factors are strongly implicated in the cause of ethnic group differences in intelligence. 
C)  Intelligence is at least somewhat genetic in origin. 
D)  The average IQ for some minority groups in the United States is several points lower than the average for white Americans.

Ethnic Differences

Variations in genetics, culture, tradition, language, and social structure among ethnic groups.

Social Classes

Categories of individuals in a society grouped based on their economic status, occupation, and associated social practices, which can affect their life opportunities and experiences.

Intelligence

Intelligence is the capacity for logic, understanding, self-awareness, learning, emotional knowledge, reasoning, planning, creativity, and problem-solving.