To find the range of the weights from the given stem-and-leaf plot, we need to identify the minimum and maximum values.
The minimum weight is the smallest value in the plot, which is 70 pounds (7|1136). The maximum weight is the largest value in the plot, which is 116 pounds (11|347).
Range = Maximum weight - Minimum weight
Range = 116 pounds - 70 pounds
Range = 46 pounds
So, the correct answer is:
D. 46 pounds