Interviewing a few people from a selected group is a type of: ((MCAER 2014))

✅Explanation: Variable inputs are those that can be adjusted in quantity or quality depending on the level of production. Seeds and fertilizers are variable inputs because their use can be increased or decreased to match the desired output.

📌Other Options Explanations:
-B. Fixed inputs are those that cannot be easily changed, such as land or buildings.
-C. Intermediate inputs are goods or services used in the production.
-D. Capital inputs are long-term assets used in production, such as machinery or equipment.