Which statement concerning ethics is most accurate?
A. Because declawing cats is excessively painful and considered unethical, euthanasia should be performed when cats cannot be discouraged from causing damage with their front claws
B. Clients should not be allowed to be present when their pet is euthanized
C. A client's request for euthanasia of a terminally ill pet should always be denied; euthanasia is never ethical
D. It is appropriate to send a sympathy card to the client following the death of a pet