Of the following, which type of data collection method is likely to have the lowest response rate

I had a question like this on a test. The answer is F - mail questionnaire.
Mail questionnaire has a very low response rate.

You need choices to answer this question?

Idon't see any answer choices for your question, but the answer would to highlight the box, and drag the box to the box of choice (or do a simple copy and paste, and delete the old data).