Oxygen should be administered:

a. To all patients
b. Only in low concentrations
c. In high concentration to all patients as it will not cause harm
d. To patients who have signs of hypoxia

d
Rationale: a. Not all patients need oxygen. It should be administered to those patients experiencing hypoxia.
b. There are some patients who require high concentrations of oxygen such as the severely hypoxic patient.
c. The administration of oxygen should be based on the patient who is experiencing hypoxia.
d. Correct.