Gina and Margaret Are Pregnant at the Same Time

Gina and Margaret are pregnant at the same time.
Gina's fetus is quite active throughout the day, whereas Margaret's fetus is rather inactive. Which of the following explanations would be the best guess as to how active their infants will be?

A) Gina's infant is likely to be more active than Margaret's infant.
B) Margaret's infant is likely to be more active than Gina's infant.
C) Gina's infant and Margaret's infant will probably be similar in activity level, as all infants have similar levels of activity.
D) There is no way to predict postnatal activity level from prenatal activity level, so we cannot even make a guess about the infants' activity levels.