I believe it’s A in the question
        
             
        
        
        
The brain contains
billions of interconnected neurons and glia. <span> Glia cells</span><span> enclosed the  neurons and provide support for and insulation
between them. It  is also the most abundant </span>cell types in the
central nervous system. While Neurons are the basic units of the nervous system and it is the
most important part is the brain. 
<span> </span>
 
        
             
        
        
        
D) the earthworm measurement is accurate because moore subtracted the beginning and ending points from the ruler
        
                    
             
        
        
        
This is false. The nucleus of a cell stores the DNA and controls the cell’s action, but chromatin is the protein in the nucleus that folds DNA into tiny packages.