Which of the following statements concerning the use of carbon dioxide to euthanize rodents is true?
a. The technique is rarely used in rodents because both adults and neonates are very resistant to low oxygen levels and death by carbon dioxide inhalation. b. Compared to adults, neonates are much more susceptible to low oxygen levels, and less resistant to death by carbon dioxide inhalation. c. Adults and neonates are about equally resistant to low oxygen levels and susceptible to death by carbon dioxide inhalation. d. Compared to adults, neonates are resistant to low oxygen levels, and less susceptible to death by carbon dioxide inhalation.