Final answer:
Option 2). Advance directives can be updated at the time of the patient's choosing.
Step-by-step explanation:
Once established, advance directives can be modified whenever the patient desires. Advance directives are legal agreements that specify a person's choices for medical interventions and care, typically in the event that the person becomes unable of expressing their own decisions or becomes incapacitated. These contracts are crucial in ensuring that a person's wishes are understood and honored by loved ones and medical professionals. When we see the other options, they are relevant to advance directives. Hence, Option 2). Time of patient's choosing is the correct answer.