The Patient Has Been in the Hospital for a Hip

The patient has been in the hospital for a hip replacement.According to his critical pathway,he should have his Foley catheter discontinued on the fourth day after surgery.Instead,the patient has it removed on the third day and is voiding normally with no problems.This would be a sign of:

A) a negative variance.
B) positive case management.
C) a positive variance.
D) use of SBAR.