The p wave represents atrial contraction
        
             
        
        
        
As humans, it is important to be aware of the consequences our actions cause. For instance, if you steal an apple from a market you need to be aware that the negative outcomes (getting arrested and serving time) is far more worse than the positive (getting a free apple) therefore it is like this for most other choices humans make. So you really have to think is it worth it or is it something I need it want? 
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The amount of electrons and energy levels.
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Answer:
D. Re-serve uneaten bread
Explanation:
Re-serve uneaten bread   is NOT a safe serving technique because once an aliment has left the kitchen or the prep stations, you don't know what happened to them.
Although unlikely, the customers would have placed something in the bread.  Bigger risk is that they just handled them with uncleaned hands spreading their germs all over.  So, that bread cannot be considered safe to serve to a new client.