Most people who are color-blind see no color, only black, white and shades of gray

Which study would provide the best picture of worldwide developmental growth patterns?

a. Examining patterns of friendship in each grade level at an elementary school in Tokyo. b. Watching a newborn turn into an adult. c. Comparing children raised in Bangladesh to those raised in the United States. d. Every two years, looking at a set group of subjects across 50 randomly chosen countries from birth to death.

Based on current research, which statement is most justified?

A) Genetics increase a person's vulnerability to develop schizophrenia. B) Genetics may not be sufficient for schizophrenia, but everyone who develops schizophrenia must have some number of "schizophrenia genes." C) Genetics cannot play a significant role in the cause of schizophrenia because most people with the disorder have no close relatives who have it. D) Genetics play such a strong role that they are a sufficient condition for schizophrenia.