There are various costs associated with conducting surveys. Which of the set represents the correct ascending (least expensive to most expensive) order of cost per completed survey?

There are various costs associated with conducting surveys. Which of the set represents the correct ascending (least expensive to most expensive) order of cost per completed survey?

There are various costs associated with conducting surveys. Which of the set represents the correct ascending (least expensive to most expensive) order of cost per completed survey?



A.

mail

online

telephone

personal interview


B.

personal interview

mail

telephone

online


C.

online

mail

telephone

personal interview


D.

personal interview

online

telephone

mail



Answer: C


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