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.

Question: A rat pathogen that has fleas as vectors of transmission to humans is: 
 Options:  <0> Rickettsia rickettsii. <1> Yersinia pestis <2> Borrelia burgdorferi. <3> Ehrlichia ewingii. <4> Brucella abortus.
biology

Question: The epithelium of the epidermis is: 
 Options:  <0> Stratified keratinized plane. <1> Stratified non-keratinized plane. <2> Simple keratinized cylindrical. <3> Keratinized stratified cylindrical. <4> Cubic stratified.
biology

Question: What characteristics increase the reliability of the psychophysiological evaluation? 
 Options:  <0> The law of initial values. <1> The autonomic balance and homeostasis. <2> The latency and duration of the answers. <3> The control of environmental artifacts and the organism. <4> The reactivity

psychology