Which Scenario Best Illustrates the Use of Data Validation When

Which scenario best illustrates the use of data validation when an independent nursing clinical decision is made?

A) The nurse determines that a wound dressing needs to be removed when the patient reveals the time of the last dressing change,and the nurse notices that the present dressing is saturated with fresh and old blood.
B) The nurse administers pain medicine due at 1700 hours at 1600 hours because the patient complains of increased pain.
C) The nurse removes a leg cast when the patient complains of decreased mobility.
D) The nurse administers potassium when a patient complains of leg cramps.