Answer:
C. interact frequently with the audience. 
Explanation:
Presentation can be defined as an act of talking or speaking formally to an audience in order to explain an idea, piece of work, project, and product with the aid of multimedia resources or samples. 
Students who want to create an effective presentation should interact frequently with the audience.
This ultimately implies that, to create an effective presentation, speakers are saddled with the responsibility of interacting more often with the audience by taking questions, making a joke, getting them to repeat informations loud at intervals etc. 
Additionally, students are advised to be passionate and show enthusiasm during their presentation because it would enhance their ability to speak confidently and as such leading to an engaging presentation. 
 
        
                    
             
        
        
        
Ito ay nangangahulugan na ang kanilang ekonomiya ay nawawalan at ang kanilang gawain ay weaker. Higit pang mga mahihirap na pamilya.
        
             
        
        
        
C) The other answer choices are reasons why the U.S did not join the L.o.N
        
             
        
        
        
There can be bad side effects leading to a possible accident
        
                    
             
        
        
        
It an adjective that follows a linking verb and changes the subject of the a linking verb