Scott and Shawn are identical twins raised together, whereas Tammy and Tracey are identical twins raised apart. Scott and Shawn are more similar on IQ than are Tammy and Tracey. This finding
A)rules out a purely genetic explanation for IQ
B)rules out a purely environmental explanation for IQ
C)suggests that environment is not important for determining IQ
D)suggests that genetics are not important for determining IQ

Question

Quizplus · Accepted Answer

The finding that Scott and Shawn, who were raised together, are more similar in IQ than Tammy and Tracey, who were raised apart, suggests that environmental factors play a role in determining IQ, thus ruling out a purely genetic explanation.

Scott and Shawn Are Identical Twins Raised Together, Whereas Tammy