Answer:
I think the answer is the first option, more reliable and harder to use.
Explanation:
I think this because technology is expensive and the most reliable thing we have right now so the other options don't make sense.
 
        
                    
             
        
        
        
Answer:

Explanation:
In a chemical reaction, the <u>produc</u>ts are <u>produc</u>ed. The <em>react</em>ants are the substances that <em>react.</em>
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In a chemical reaction equation (with the arrow pointing right) the reactants are on the left and the products on the right. 
The reactants enter and the products come out. 
So, the statement given - products enter a reaction and reactants come out - is false and it is actually the other way around. 
 
        
             
        
        
        
I believe it is A. Nerve. I am pretty positive I am right.