The following table cross-classifies pregnant women in the study by their body mass index (BMI) at 16 weeks gestation and whether they had pre-term delivery. What proportion of women with BMI greater than 35 delivers pre-term?   BMI < 30 BMI 30–34.9 BMI 35+ Pre-term 320 80 120 Full term 4700 480 300 A)0.0867 B)0.2857 C)0.0533 D)0.533

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