Ick . " Rin held up her hands and made a face . " I 'll be right back . " She swished the stains and stink away in the running stream and scrubbed well with clean sand and under her fingernails until her skin turned pink . Her right hand seemed a little weak , the buzz and tingle increasing rather than going away . On the same side , her neck and the joint of her jaw grew numb .

Question: Why did Rin wash her hands ?
Answer: to prepare for a surgeryTo get rid of the horrible smell and stainsto prepare for a date with the local cowboybecause it was part of her normal routine and the water was warm