It would be D. being able to eat plants that survive in the changed environment
Hope this helps :))
 
        
                    
             
        
        
        
In meiosis, the chromosome pairs do the crossing over where there is an exchange of genetic material between them and because of it the
chromatids held together by the centromere are no longer the same.
        
             
        
        
        
Answer:
if crossing over does not occur, the products are parental gametes. If crossing over occurs, the products are recombinant gametes. Meaning they are mixed. 
Explanation:
If crossing over doesn't occurs then you wouldn't really mix the 2 parental alleles so you couldn't have a genotype without mixing. 
Sorry if im wrong!