Dr. Haden, Dr. Plomin, and Dr. Waldman all conduct twin-design Behavioral Genetics studies of IQ. Dr. Haden's participants are all 4-year-old twins. Dr. Plomin's participants are all 18-year-old twins. Dr. Waldman's participants are all 65-year-old twins. Which of the following is MOST likely to happen? A. Compared to her colleagues, Dr. Haden will be the most likely to conclude that there are large genetic contributions to IQ. B. Compared to her colleagues, Dr. Haden will be the most likely to conclude that there are large environmental contributions to IQ. C. Compared to her colleagues, Dr. Plomin will be the most likely to conclude that there are large environmental contributions to IQ. D. Compared to her colleagues, Dr. Plomin will be the most likely to conclude that there are large genetic contributions to IQ.