Clara Is a 37-Year-Old Cook

Clara is a 37-year-old cook. She is admitted for treatment of partial and full-thickness burns of her entire right lower extremity and the anterior portion of her right upper extremity. Her respiratory status is compromised and she is in pain and anxious. Performing an immediate appraisal, using the rule of nines, the nurse estimates the percent of Clara's body surface that is burned is:

A) 4.5%
B) 9%
C) 18 %
D) 22.5%