Final answer:
The most therapeutic response by the practical nurse in this situation is to acknowledge the difficulty of the treatment and ask the patient to express their concerns.
Step-by-step explanation:
The most therapeutic response by the practical nurse in this situation is option b) "This is very difficult treatment. Tell me about what is bothering you the most."
By acknowledging the difficulty of the treatment and asking the patient to express their concerns, the nurse is showing empathy and creating a safe space for the patient to communicate their feelings. This response can help the nurse understand the specific issues the patient is facing and provide appropriate support.