Final answer:
An appropriate system-level response to a weak signal in a healthcare setting involves changing shift schedules and implementing a different system for medication storage and dispensing.
Step-by-step explanation:
An appropriate system-level response to a weak signal in a healthcare setting would involve changing the scheduling of shifts to prevent excessive fatigue among caregivers and implementing a different system for medication storage and dispensing on each nursing unit to prevent medication errors.
Changing the scheduling of shifts can help ensure that caregivers have adequate rest and reduce the risk of errors due to fatigue. Implementing a different system for medication storage and dispensing can prevent look-alike medications from being placed next to each other, reducing the chance of medication errors.
Therefore, the correct answer is Option D: Both changing the scheduling of shifts and having a different system for medication storage and dispensing on each nursing unit.