Final answer:
The appropriate action for the LPN upon noticing a client looking pale and shaky is to assess her vital signs and immediately notify the charge nurse as patient care takes precedence over non-clinical tasks.
Step-by-step explanation:
When the LPN notices that a client looks pale and shaky, her priority should be to assess client safety and inform a registered nurse. Therefore, the action she should take is b. Assess the client's vital signs and notify the charge nurse. As an LPN with clinical knowledge, especially in a sensitive area such as the neonatal intensive care unit, she understands that a pale and shaky appearance could be indicative of a significant health issue that requires immediate attention. An LPN's role often includes monitoring and reporting on patient conditions, and while stocking rooms is certainly a non-clinical task that can be performed, patient care always comes first.