Which of these is an example of a non-random sample? a. a newspaper puts two hundred postage-paid surveys in the sunday papers which were delivered to 100,000 subscribers. b. viewers of a news program are chosen to take a survey on opinions about a news story. c. fifteen words are chosen from the saturday morning newspaper to calculate the average vowels per word in a news story. d. a news station surveys their reporters about their favorite weather forecasters.