The use of alcohol by the operator can have an effect in operational safety of the vessel and that would include the crew as well as the passengers. Hope this is the right answer and would be of big help.
        
                    
             
        
        
        
The<em> cell membrane</em> controls the movement of substances in and out of cells and organelles. In this way, it is selectively permeable to ions and organic molecules.
 
        
             
        
        
        
Did you ever figure out the answer to this? I have the same question and don't know the answer. 
 
        
             
        
        
        
Answer:
A. The scientist should restart the experiment at a step prior to
contamination.
Explanation: