I believe the answer is C. 
because when the dinosaurs thrived they ate most of the mammals which were small animals but when the dinosaurs went extinct the mammals grew larger in size and started to thrive.
        
             
        
        
        
A stem is what keeps the plant together and supports their leaves
B. STEMS 
        
             
        
        
        
Answer:
increase the speed of running water
Explanation:
hope it was right
 
        
                    
             
        
        
        
Overuse of antibiotics is causing this resistance, we can let our bodies fight off bacterial infections naturally, stop the overuse of antibacterial soaps and cleansers, let our bodies build up resistance to these bacterias naturally through natural exposure.