The patient has contracted a urinary tract infection (UTI) while in the hospital. Which action will $\mathbf{most}$ likely increase the risk of a patient contracting a UTI?

A) Reusing the patient's graduated receptacle to empty the drainage bag.
B) Allowing the drainage bag port to touch the graduated receptacle.
C) Emptying the urinary drainage bag at least once a shift.
D) Irrigating the catheter infrequently.