In this task, you are given a question and answer options for that question. Using this information, you have to classify each text into different topics: medicine, nursery, psychology, chemistry, pharmacology, biology.

Q: Question: One of the main concepts of Acceptance and Commitment Therapy is: 
 Options:  <0> The relativization of the context. <1> The underlying reason. <2> The experiential avoidance. <3> The resistance to change. <4> Emotional vulnerability

A: psychology
****
Q: Question: Crohn's disease is an inflammatory process that is characterized by: 
 Options:  <0> It affects the superficial mucosa of the colon. <1> It usually occurs with rectal bleeding. <2> The affectation is uniform, producing continuous injuries. <3> The colectomy cures the disease. <4> It affects any stretch of the gastrointestinal tract.

A: nursery
****
Q: Question: Indicate the net charge of an amino acid with a neutral R group for a pH value below its pI: 
 Options:  <0> Negative net charge. <1> Positive net charge. <2> Without charge. <3> It is necessary to know the exact pH value to answer this question. <4> It is necessary to know the concentration of the amino acid to answer this question.

A:
chemistry
****