Answer:
a
Explanation:
its more direct..it makes more sense 
 
        
             
        
        
        
Im just some random dude so i think its maybe assisting them
        
             
        
        
        
the answer is b but i don't know the last one srry
 
        
             
        
        
        
What is the evolutionary process that causes antibiotic resistant bacteria to increase and antibiotic sensitive bacteria to decrease in an environment where antibiotics are present called :
- Antibiotic selection