Which of the following is true of Simon LeVay's finding that a region of the brain is typically smaller in homosexual males than it is in heterosexual males?
A) If true, this would be strong evidence that sexual orientation is genetically determined.
B) A confounding variable in the study is that many of the gay men in the study died from HIV complications.
C) LeVay's findings have been replicated many times.
D) If true, this would be strong evidence that sexual orientation is environmentally determined.
Answer: B
Rationale: The purportedly homosexual men whom LeVay studied died of complications associated with HIV, which could have accounted for the differences in their brains. This, along, with the fact that others have had difficulty replicating the study's findings, have led some to be skeptical. Even if the results are true, the differences in the hypothalamus could have been due to environmental factors, not just genetic factors as many assume.
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