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

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.The modal class is:

A) 60 but less than 70.
B) 70 but less than 80.
C) 80 but less than 90.
D) impossible to determine.