The Nurse Applied a Hot Compress to a Resident's Right

The nurse applied a hot compress to a resident's right knee and delegated for the nursing assistant to monitor the knee every 5 minutes while the compress is in place for the next 20 minutes. The nursing assistant should notify the nurse immediately if the right knee:

A) becomes pale and does not return to the color of the left knee.
B) is warmer than the resident's left knee.
C) is reported as having less discomfort than the left knee.
D) is more mobile than the left knee after the application is done.