Final answer:
To maintain surgical asepsis for urinary catheterization, the nurse should gather new sterile supplies and start over.
Step-by-step explanation:
To maintain surgical asepsis for the urinary catheterization procedure, the nurse should gather new sterile supplies and start over, as Option D suggests. Inadvertently contaminating the catheter by touching the bed linens compromises the sterility of the procedure, putting the patient at risk for sepsis. Starting over with new sterile supplies ensures that the procedure can be performed in a sterile field, minimizing the risk of infection.