Honda USA is interested in learning what its 1,050 U.S. dealers think about a new service program the carmaker began providing to dealers at the beginning of last year. Honda USA wants to know if the dealers are using the program and, if so, what they like and dislike about it. The carmaker does not want to survey all 1,050 dealers, but hopes to ensure that the results are representative of all dealers.

a. What sampling plan should be used? b. Why?