I believe that the option about applicant 3 best explains the career of the applicant.
The background of Applicant 3 in child psychology could help him/her understand the students, especially children, while teaching, if he/she is teaching. The applicant's background in human development is also beneficial in teaching by using his/her knowledge in developing his/her students holistically as a person. This knowledge is also very applicable in the professional field, specifically in the human resource and training department and management. The applicant's background in child psychology is also applicable in the field of medicine.