Given the task definition, example input & output, solve the new input case.
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'.
Example: Question: A 13-year-old girl is operated on due to Hirschsprung illness at 3 months of age. Which of the following tumors is more likely to be present?
Options: <1> Abdominal neuroblastoma <2> Wilms tumor <3> Mesoblastic nephroma <4> Familial thyroid medullary carcinoma.
Output: 2
The answer to the given question should be a tumor, therefore Wilms tumor is the correct answer for the given question.

New input case for you: Question: For self-registration to become an effective tool for clinical evaluation, it must meet the requirements of:
Options: <1> Have a complete design that includes each of the significant units of a complex behavior and its memory. <2> Have a simple design, without sophistication or complexity, and always accompanied by a prior training for its completion. <3> Do not limit your compliance to the events that occurred at the time but also to the memory that you have of them at later moments. <4> Cover each and every one of the behaviors problems identified by the client. <5> Be completed by a significant person who knows the client well.
Output:
2