The nurse is working with a child who has a diagnosis of Duchenne muscular dystrophy. While assessing the motor development of a 6-year- old child, the nurse is most likely to find Gower's sign. This is evident when the child:

Rationale: A. Demonstrates cog-wheeling in arm movements and in walking and shows a characteristic shuffling gait when walking: Cog-wheeling and shuffling gait are more characteristic of Parkinson’s disease and are not associated with Duchenne muscular dystrophy or Gower’s sign. B. Walks flat footed with a duck-like walk, although the child will not walk unless someone insists and makes the child walk: A waddling gait can occur in Duchenne muscular dystrophy, but reluctance to walk unless prompted is not a defining feature of Gower’s sign. C. Uses a series of maneuvers and walks the hands up the legs in order to rise from a sitting to a standing position: This is the hallmark of Gower’s sign. It occurs due to proximal muscle weakness, especially in the hips and thighs, forcing the child to push on their own legs to stand. D. Grabs onto furniture or people in order to get from any position to a standing position: While this suggests difficulty rising, reliance on external support does not describe Gower’s sign, which specifically involves using one’s own body for leverage.