Answer:
a. synergism
Explanation:
When two different drugs inhibit a single biochemical pathway of microbes less quantity of each drug is required in combination to produce the effect than when used separately. This effect is called synergistic interaction of drugs. 
Both beta-lactam antibiotics such as penicillin and cephalosporin and clavulanic acid serve as beta-lactamase inhibitors and inhibit the beta-lactamase-producing bacteria. Therefore, beta-lactam antibiotics and clavulanic acid are used in combination to control these enteric bacteria. 
 
        
             
        
        
        
Answer:
No, it did not rain today in Texas.
 
        
                    
             
        
        
        
Only some of the equator gets to experience day and night. When Uranus revolves around the Sun, one part gets light and day while the other gets night and darkness. So it changes because one time you can be looking and its day. Then you will look again and it will be night since Uranus moved around the Sun.
        
             
        
        
        
Well the U.S. consumes about 7.19 Billion barrels of petroleum related products in 2016.
The U.S. currently uses roughly 25% of all of the world's global reserves.
Hey, America likes oil, leave them alone