Final answer:
To identify whether the patient is being abused, the nurse should ask the patient how he obtained the bruises on his arm.
Step-by-step explanation:
The assessment question that will assist the nurse in identifying whether the patient is being abused is option d. How did you obtain those bruises on your arm? The patient's statement about his daughter getting angry when he urinates on himself, coupled with the presence of bruises on his arm, raises concerns about possible abuse. By asking this question, the nurse can gather more information about the bruises and assess the situation further.