Answer:
C- Questionnaires, subjective surveys, rating scales, and focus groups.
Step-by-step explanation:
Primary methods of data collection in qualitative studies are usually questionnaires, experiments, correlation, focus group, rating scales and others.
Primary data can be collected in a number of ways however the most common techniques are self-administered surveys, interviews, field observation, and experiments.
Primary data collection is quite expensive and time consuming. Some of the quantitative data collection methods include various forms of surveys – online surveys, paper surveys, online polls, and systematic observations.