Read the following context and choose the best option to answer the question.
Context: According to media reports , the " look and leave " policy only created a chaotic situation , as vehicles lined more than 10 miles of Interstate 45 out of Houston and the city became overwhelmed with returning evacuees . ( The Galveston Daily News reports the policy will be reinstated on Sept. 24 .
Question: What is the reason for the 10 mile back up on the interstate ?
Options: 
A. Looting caused the backup .
B. None of the above choices .
C. The back up was caused by poor police activity .
D. A snowstorm caused the backup .


B