dou was sick for 2 days . the night b4 , she woke up with a low grade fever of about 37.7 degree . so as usual , the daddy pasted a fever patch on her tiny forehead .

Question: What caused Dou 's father to apply a fever patch to her forehead ?
Answer: None of the above choices .He is being paid to write an Amazon review of the fever patch brand , and is trying itHe is testing out a new brand of fever patch to see if it is more effective than the last brandThe girl is sick , and this may help treat the symptoms of the illness