Which of the Following Better Explains 'Budget

Which of the following better explains 'Budget'? 

A)  A budget serves as a vehicle for delegating activities and responsibilities to lower management levels in the organization. 
B)  A budget serves as a vehicle for activities and responsibilities of senior management levels in the organization. 
C)  A budget serves as a vehicle for delegating activities and responsibilities to senior management levels in the organization. 
D)  A budget serves as a vehicle for monitoring activities and responsibilities of lower management levels in the organization.