Answer:
we need more from the question
Explanation:
 
        
             
        
        
        
<span>Geography The land between the Tigris and Euphrates rivers was. a good region for agriculture. Geography The environment of Mesopotamia presented several. challenges to the people who lived there. Geography Mesopotamians changed their environment to improve life. 
Hope this helps you!!! :-)</span>
        
                    
             
        
        
        
Answer:
I would say C.
Explanation:
It makes the most sence with the question.
Have an amazing day!
PLEASE RATE!
 
        
                    
             
        
        
        
Since when you write in scientific notation and the first number has to be infront the decimal, it would be 6x10^-6 and it would be a negative because you moved the decimal to the write and not the left to make it positive hope this helps :))))
        
             
        
        
        
The answer to your question is, Tank trucks marked with hazardous materials.
Hope i could help :)