C is correct. the rest is either about food webs or about both food webs and food chains. 
        
             
        
        
        
This is because both strands of DNA have complementary bases. The nucleotide sequence of each automatically gives the needed information to produce its partner. This needed information is Genetic/DNA/Parent Cell. Each cell serves as it's own template in order to acquire this.
        
             
        
        
        
A. People can Change the way that the genes flow
 
        
             
        
        
        
The condition is documented as jaundice. 
        
             
        
        
        
Migraines are frequent intense aches of the head of neck
that are not caused by another physical disorder. Severe pain may usually be
felt on either one side or both sides of the head. Pain usually is felt in the temples.
Migraine could last for hours or couple of days.