Among the Following Relative Advantage Claims for a Pull Manufacturing

Multiple Choice

Among the following relative advantage claims for a pull manufacturing, which ones are likely to be true?
1) The system operates with almost no WIP inventory
2) Less maintenance is required
3) There is not much need to forecast demands
4) Only when it is needed, value is added to incomplete product

A) (4)
B) (1) and (4)
C) (2) and (3)
D) (1) , (3) , and (4)