Which of the following statements regarding twins is correct?
A. The umbilical cords should not be clamped and cut until both babies are born.
B. Identical twins have only one umbilical cord coming out of each of the placentas.
C. There are two placentas if only one umbilical cord is attached to the first placenta.
D. Twins usually weigh more than single babies and are less prone to hypothermia.
Answer: C. There are two placentas if only one umbilical cord is attached to the first placenta.
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