Answer:
B). Interview.
Step-by-step explanation:
Interview is characterized as one of the most authentic sources for collecting the information of individual's personal experiences as it offers the first hand data without any adulteration that assists in enhancing the quality of the research. Since Carolyn wishes to involve personal experience, 'interview' would be the most appropriate source as it would provide her with the necessary information from the people themselves(first hand data) that she could refer to in her work and make it more elaborate and effective. Thus, option B is the correct answer.