Read the following context and choose the best option to answer the question.
Context: We ' ve already researched about the skull bones fusing early ( because she has a ridge running from front to back ) and I worried she did n't have sweat glands because she does not have tears yet . She got hot and clammy today though , so I ' m assuming she sweats , but maybe her tear ducts are blocked . Mommyitis . Amanda asked to have Nicole on her chest today . Nicole rooted around on her until Amanda said , " Get this off me !
Question: Why is there so much tension between Amanda and Nicole ?
Options: 
- Amanda and Nicole are stressed by their relationship with each other .
 - None of the above choices .
 - Amanda and Nicole are stressed by their mother 's interaction with them .
 - Amanda and Nicole are stressed by the medical procedure .


Amanda and Nicole are stressed by the medical procedure .