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.