Final answer:
The family understands instructions about the PCA pump if they say they will make sure to push the PCA button every 6 minutes.
Step-by-step explanation:
The correct statement that indicates the family understands instructions about the PCA pump is option 1: "I'll make sure that she pushes the PCA button every 6 minutes." This statement shows that the family understands the timing requirements for administering the pain medication through the PCA pump. By pushing the button every 6 minutes, the patient can receive a dose of morphine when needed.