According to a recent historical study, capital punishment deters murder only during weeks when well-publicized executions take place. During such weeks, homicides fall to a level below average. The yearly murder rate, however, is not affected by the number of well- publicized executions.
If the above passage is true, which of the following statements must also the true?
A.In the period studied, the number of well-publicized executions remained virtually the same from year to year.
B.For at least one week during any years in which there were well-publicized executions, murder rates were above average.
C.During some weeks of each year of the study, an extraordinary number of public executions took place.
D.In the past, newspapers considered capital punishment important news and devoted extensive coverage to all executions.
E.Many executions that took place during the period studied were not reported objectively by the media.