The correct answer is B. Indirect methods.
Step-by-step explanation
A functional evaluation method is a methodical way to understand the behavior of a person in a given environment and to be able to interpret why they behave like this. Within the functional evaluation methods there is a subcategory in which the researcher interviews a secondary actor who has direct contact with the subject being studied. This means the researcher studies the subject indirectly. According to the example in the question, the teacher would be that intermediate actor that serves the psychologist to evaluate the student's behavior. Therefore, the correct answer is B. Indirect methods.