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The best answer is Developmental milestones met are A) Running and jumping.
Despite a disadvantageous start, Harper is now meeting all of her developmental milestones, including running and jumping. A developmental milestone is a skill or behavior that is expected of a child at a certain age. Fetal growth and overcoming addiction to an illegal substance are naturally not milestones associated with a 2 year-old child. Note that spinal cord growth does continue into this age, and any issue with this would impede her other milestones, such as running and jumping, but it is not a developmental milestone in itself.
Despite a disadvantageous start, Harper is now meeting all of her developmental milestones, including running and jumping. A developmental milestone is a skill or behavior that is expected of a child at a certain age. Fetal growth and overcoming addiction to an illegal substance are naturally not milestones associated with a 2 year-old child. Note that spinal cord growth does continue into this age, and any issue with this would impede her other milestones, such as running and jumping, but it is not a developmental milestone in itself.