Question

cindy has an identical twin who she has never met because they were separated at birth. a researcher is interested in examining the iq levels of both women. he finds that their iq levels are virtually the same, even though they were raised in different countries. this would bolster the argument that intelligence is influenced highly by
o environment
o nature
o genetic mutation
o nurture

Explanation:

Identical twins share 100% of their genes. Since they were raised in different environments (different countries) but have the same IQ, it suggests genetics (nature) play a major role. Environment (nurture) would imply different IQs if it were the main factor. Genetic mutation is not indicated here as there's no mention of a new genetic change.

Answer:

nature