Using the Following Data,what Would Be the Range of the Values

Multiple Choice

Using the following data,what would be the range of the values of the stem in a stem-and-leaf display? $\begin{array}{llllllll}\text { 1. } & 11.5 & 6 . & 13.7 & 11 . & 11.0 & 16 . & 14.5 \\\text { 2. } & 13.5 & 7 . & 14.0 & 12 . & 13.0 & 17 . & 15.5 \\\text { 3. } & 12.5 & 8 . & 12.0 & 13 . & 16.7 & 18 . & 13.0 \\\text { 4. } & 15.2 & 9 . & 12.7 & 14 . & 12.5 & 19 . & 18.2 \\\text { 5. } & 14.7 & 10 . & 12.5 & 15 . & 11.5 & 20 . & 11.7\end{array}$

A) 11-17
B) 11-18
C) 10-18
D) 12-17
E) 12-18