Final answer:
The nurse will consider the recent parental death as the most likely cause of the wetting.
Step-by-step explanation:
The nurse is gathering a health history from the grandparent of a previously toilet trained toddler who has started wetting again. The nurse will consider the recent parental death (option 2) as the most likely cause of the wetting. Emotional stress, such as the loss of a parent, can often trigger regression in previously learned behaviors, including toilet training. This can lead to temporary bed-wetting or wetting accidents during the day.