While teaching a new mother how to change the diaper of her newborn, the LPN/LVN hears a "clunk" when the mother pushes the infant's legs forward to position the fresh diaper under its hips. The LPN/LVN knows this is indicative of which of the following?
1. The mother's lack of knowledge about how to gently handle the baby.2. Juvenile idiopathic arthritis.3. Developmental hip dysplasia.4. Hypocalcemia.