The logic of comparing the personalities of MZ twins to DZ twins assumes that . . .
a. The environments of MZ twins are more similar than the environments of DZ twins
b. The samples of both MZ twins and DZ twins are drawn equally randomly from the population
c. All other variables are controlled
d. None of the above
d. None of the above
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What percent of babies worldwide are born at home?
a. 10% b. 30% c. 50% d. 80%
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