D is the correct answer. You can omit as many words as you want, as long as 'the meaning and spirit of the quote is retained', that is, the general sense you wanted to convey with that quote is still there, even after you deleted those several words. 
        
                    
             
        
        
        
"To study" is a verb in the infinitive form.
        
                    
             
        
        
        
I believe that the answer to the question provided above is that the <span>observation of oliver schreiner regarding political class of south africa during twentieth century is that the wealth there is not balance large population are poor.</span>
Hope my answer would be a great help for you.    If you have more questions feel free to ask here at Brainly.
        
             
        
        
        
Where is the sentence at and i will answer it for you. I am the best at english.