When Teaching the Patient and Caregiver About Clean Intermittent Self-Catheterization

When teaching the patient and caregiver about clean intermittent self-catheterization (CISC) ,why is it important for the nurse to teach about the signs and symptoms of complications?

A) Although rare,complications are always severe.
B) It is part of the process; complications almost never occur.
C) Urinary complications are common with CISC.
D) The only major complication is infection.