Below Is a Sorted Stem-And-Leaf Diagram for the Measured Speeds $=10$

Multiple Choice

Below is a sorted stem-and-leaf diagram for the measured speeds (miles per hour) of 49 randomly chosen vehicles on highway I-80 in Nebraska. How many vehicles were traveling exactly the speed limit (70 mph) ? stem unit $=10$
leaf unit $=1$
$\begin{array}{rrl}\text { Frequency } & \text { Stem Leaf } \\1 & 4 & 9 \\1 & 5 & 5 \\17 & 6 & 01222455556688999 \\19 & 7 & 0111233345666778999 \\7 & 8 & 0133557 \\\underline{4} & 9 & 0122 \\49 &\end{array}$

A) 0
B) 1
C) 19
D) Impossible to tell