Final answer:
The highest priority prescription for a client showing signs of sepsis is to administer the ordered IV antibiotics promptly, as it is essential to address the underlying infection and prevent progression to severe sepsis or septic shock. Option c.
Step-by-step explanation:
The prescription with the highest priority in the client's care, considering the symptoms of cough, fever, fatigue, recent upper respiratory infection (URI), and type 1 diabetes, along with the vital signs showing tachycardia, hypotension, tachypnea, fever, and lowered oxygen saturation on supplemental oxygen, is C. Administer the ordered IV antibiotics. The client's clinical presentation is suggestive of sepsis, potentially precipitated by a bacterial infection.
Rapid administration of IV antibiotics is critical to address the underlying infection and prevent further decline into severe sepsis or septic shock. Following antibiotic administration, the other actions such as drawing blood cultures and checking serum lactate and glucose levels can also be performed to further assess the client's condition and guide additional treatment. However, starting antibiotics should not be delayed for these tests.