According to a study by Fellman (2013), the chances of twins:
A. increase when a woman conceives before she is 21.
B. increase with parental age.
C. decrease with the number of times couples have sex before conception.
D. decrease with the use of fertility drugs.
Answer: B
Psychology
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From 1930 until the 1960s, the ____ was the primary research subject for the neobehaviorists and learning theorists
a. ?human being b. ?white man c. ?white bunny d. ?white rat e. ?cat
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