The local grocery store wants to know if the shoppers prefer crest or colgate toothpaste. the store gives all of its shoppers a value saver card, then uses a random number generator to select 30 card numbers and surveys those shoppers. is this sampling method representative of the entire population and explain? a. no, some shoppers may not buy toothpaste there. b. yes, all shoppers have a value card and the shoppers interviewed were chosen by a random number generator. c. no, need a bigger sample. d. no, the store should only ask women.