A Client at 20 Weeks Gestation Reports "Running to the Bathroom

A client at 20 weeks gestation reports "running to the bathroom all the time," pain with urination, and foul-smelling urine.  Which question is most important for the nurse to ask when assessing the client?

A) "Are you having any pain in your lower back or flank area?"
B) "Do you wipe from front to back after urinating?"
C) "Have you found that you urinate more frequently since becoming pregnant?"
D) "Have you had a urinary tract infection in the past?"