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: What might have happened to Rin before that she 's growing numb on her right side ?
Answer: Rin might have been exposed to some kind of poison .Rin might be washing herself too fast .Rin might be scrubbing herself too much .None of the above choices .