How should the nurse respond to the partner's concern?

a) "It is impossible to overdose someone who is dying because they have built up a tolerance to the medication."
b) "We can collaborate with the primary care provider to try to find a dose of pain medication that works for your partner."
c) "It is very difficult for people with terminal illness to have their pain relieved, so they may have to endure pain during the night."
d) "You may give the pain medication anytime unless your partner's respirations are less than 12 breaths per minute."