Given the task definition and input, reply with output. In this task, you are given a multiple-choice question about healthcare. Answer the question based on your information and classify your answers into '1', '2', '3', and '4'.

Question: What aspects characterize the evaluation of children's problems compared to the evaluation of adults?
Options: <1> Employ techniques and instruments with psychometric guarantees of reliability and validity. <2> Use especially observation, emphasize overt behaviors and emphasize the external determinants of them. <3> Enable the planning of the subsequent treatment. <4> Ensure the confidentiality of the information obtained. <5> Carry out the evaluation through the application of different techniques and instruments.
2