Members of a community center are planning a field trip to the zoo. More than 50 people will go on the trip. Ten people are providing their own transportation. The rest of the people will ride in k vans. Each van can carry 5 persons. 
 Which pair of statements is true? 
 A. 5k+10>50 
 The center will need more than 8 vans.  
 B. 5k+10>50  
 The center will need more than 12 vans. 
 C.  k+15>50  
 The center will need more than 65 vans. 
 D. k+15>50 The center will need more than 35 vans.