Which of the Following Would Be Considered an Example of the Drop-Off

Multiple Choice

Which of the following would be considered an example of the drop-off survey?

A) researcher brings questionnaire to respondent's home and leaves it to be completed
B) a hotel leaves a questionnaire in a room for customers to evaluate their accommodations
C) a retail store offers a customer a survey and promises a gift certificate if they return the questionnaire on their next visit
D) giving a survey to persons at work and asking them to return the completed survey when they return to work the next day
E) all of the above would be considered drop-off surveys