Television viewers often express doubts about the validity of certain commercials. In an attempt to answer their critics, a large advertiser wants to estimate the true proportion of consumers who believe what is shown in commercials. Preliminary studies indicate that about 40% of those surveyed believe what is shown in commercials. proportion? What is the minimum number of consumers that should be sampled by the advertiser to be 85% confident that their estimate will fall within 2% of the true population a) O 1257 b) O 1231 c) O 1245 d) 1230 e) O 1256 ( ONone of the above