c. Which stem-and-leaf diagram is more useful? Why? OA. The stem-and-leaf diagram with two lines per stem is more useful, since it shows the extreme outliers of the data more clearly. B. The stem-and-leaf diagram with one line per stem is more useful, since the shape of the distribution is apparent in both diagrams but the diagram with two lines per stem has a large number of empty stems. C. The stem-and-leaf diagram with one line per stem is more useful, since the diagram with two lines per stem has too many stems to determine the shape of the distribution. OD. The stem-and-leaf diagram with two lines per stem is more useful, since the diagram with one line per stem has too few stems to determine the shape of the distribution.