Carla conducts a study and finds evidence supporting a correlation between nurture and intelligence. Which of the following is Carla most likely to have found? a. Identical twins receive similar scores on a traditional IQ test. b. Adopted siblings vary greatly in their ability to learn new tasks. c. Children who are able to teach themselves to read are more likely to go to college. d. Children whose parents provide them with many books perform better academically.

First, we will analyze each option to see whether it suggests a correlation between nurture and intelligence, considering the environmental factors that may contribute to an individual's intelligence. a) Identical twins receive similar scores on a traditional IQ test: This option emphasizes genetic factors rather than environmental influences since identical twins share the same genetic makeup. The correlation may not be due to environmental factors but rather to their genetic predisposition to high intelligence scores. b) Adopted siblings vary greatly in their ability to learn new tasks: The variation in abilities among adopted siblings could be due to differences in genetic factors, as they are not biologically related, or it could be due to nurture factors such as different upbringings. However, this option does not explicitly suggest a correlation between nurture factors and intelligence. c) Children who are able to teach themselves to read are more likely to go to college: While this option could suggest a correlation between intelligence and future academic success, it does not necessarily provide evidence supporting a correlation between nurture factors and intelligence. d) Children whose parents provide them with many books perform better academically: This option explicitly connects an environmental factor (having access to books provided by parents) with academic success, which is a proxy for intelligence. Therefore, this option best supports the correlation between nurture and intelligence.

After evaluating each of the options, we can conclude that option d) Children whose parents provide them with many books perform better academically best represents a correlation between nurture and intelligence, as it directly relates a specific environmental factor to intelligence (measured by academic performance).