A review of the concordance rates for homosexuality among twin brothers indicates the rate of homosexuality in fraternal twins was 22%. How have researchers interpreted this finding?
A) The rate points to the influence of genetic factors.
B) The finding confirms previous results indicating homosexuality does not have a genetic basis.
C) This rate is above the rate for non-twin brothers and thus points to environmental influences.
D) The finding indicates the key factor in homosexuality is having a same-sex sibling in the household.
Correct Answer:
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