A Marketing Director Meets with Her Staff to Review Recent

A marketing director meets with her staff to review recent problems they have encountered in coordinating widespread and diverse aspects of their marketing plan.Which of the following reasons can explain why coordinating an IBP effort is easy? 

A)  Specialists often have knowledge only in their specialty. 
B)  Internal competition for budget allocation works against coordinated efforts.  
C)  IBP does not require explicit goals and objectives. 
D)  There is a limited number of media options available.