The correct answer is B. 
When your body and mind are fatigued you are out into a field of fuzziness. When dealing with extreme fatigue, there is the obvious problem of falling asleep in the road, which could result in terrible and most likely fatal accidents. But there are also other problems mentally and visually that can occur that would impair your driving ability when facing extreme fatigue. 
I hope this helps! :)
        
             
        
        
        
Answer:
75years
Explanation:
Let the Father's age be represented by 2x
Let the Son's age be represented by x
Five years ago;
Man's age will be = 2x - 5
Son's age will be = x - 5
If the ratio of their ages five years ago was 9:4, then;
2x - 5/x-5 = 9/4
4(2x - 5) = 9(x - 5)
8x - 20 = 9x - 45
- Collect like terms
-20 + 45 = 9x - 8x
25 = x
Hence, the son's age = 25 years
If x = 25, the father's age (2x) will be 2 × 25 = 50years
The sum of their ages will be = 25years + 50years = 75years
 
        
             
        
        
        
One is that Fungi are vitally important for the good growth of most plants, including crops, through the development of mycorrhizal associations . 
Another one is that Penicillin, perhaps the most famous of all antibiotic drugs, is derived from a common fungus called Penicillium.
Btw Your Welcome
        
             
        
        
        
I think it A I hope this help
        
                    
             
        
        
        
<h2>Answer:</h2>
 Scientists can determine the order of when rocks formed on Earth.
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Explanation:</h2>
Radioactive dating is the technique in which scientists used radioactive material like carbon or uranium to date the materials. This method of dating is based on the known decay rate of the isotopes of an element. Uranium, Carbon, and potassium are few examples of elements commonly used in radioactive dating.