Companies may use social media tools such as:

Which of the following involves interviews with a large number of respondents using a predesigned questionnaire?

A) observation B) eye-movement C) physiological measurement D) survey E) all of the above

Which of the following is true?

A) The two-bin system is an example of the order point system. B) Order quantities are fixed in the periodic review system. C) The safety stock does not depend upon the frequency of reorder. D) All of the above are true. E) None of the above is true.