Answer:
In interval B Kelly is stuck in a traffic jam.
Step-by-step explanation:
It is given that the graph shows Kelly traveling from home to her grandmother's house.
In the given graph x-axis represents the driving time and y-axis represents the distance driven by Kenny.
From the given graph it is clear that the distance driven by Kenny is remain constant in the interval B.
It other intervals, the distance driven by Kenny is increasing.
Therefore, in interval B Kelly is stuck in a traffic jam.