Answer:
C. asking candidates probing, open-ended questions
Step-by-step explanation:
Unstructured interview: In psychology, the term "unstructured interview" is also referred to as "non-directive interview" and is described as an interview in which the patterns questions are not being pre-arranged.
Unstructured interviews are often considered as opposite to the structured interview as it provides standardized questions pattern. It refers to the interaction between the investigator and the participants that are being selected to collecting data involving experiences, social world, and cognitive processes.