Answer:
c.a survey.
Step-by-step explanation:
Survey: The term survey is referred to as one of the research methods which is being used to collect or gather data from a specific group of people or respondents to achieve or gather insight or information related to a different topic of the researcher's interest.
It includes questionnaires that are being distributed among people of interest and therefore the researcher gets an idea of establishing people's behavior, attitude, and beliefs.
Types of the survey: Job satisfaction survey, market research survey, brand awareness survey, etc.