Within an Outsourcing Relationship, It Has Been Shown That Suppliers

Within an outsourcing relationship, it has been shown that suppliers sometime do not behave in the manner expected.Choose a contributing factor of suppliers' opportunistic behaviors.
1) The buyer has a stronger position in the power relationship
2) The location of the supplier is far from the buyer
3) There are many possible suppliers that can perform the same function
4) The information system of the two parties in the relationship is integrated

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