Which of the Following Sentences Provides the Most Effective Incentive

Multiple Choice

Which of the following sentences provides the most effective incentive for consumers to complete and return a survey about laundry detergents?

A) Return your completed survey by May 1, and you'll receive $40 worth of coupon discounts on products of interest to you and your family.
B) Your participation in our survey enables us to produce the best possible products for you and your family-products you can trust to be safe, effective, and economical.
C) We would really appreciate getting your opinions about detergent brands.Please send back your survey by May 1.
D) Your cooperation in returning the survey will help us make laundry detergents even better.