Answer:
The answer is: A) Keep better track of information by using a shared database.
Explanation:
If this was a multinational corporation they would probably be using SAP or some other ERP system which prevents things like this from happening. The three companies will not be willing to merge their activities into one single ERP system but they can benefit from one of its main characteristics which is a common database. This way they will be able to avoid the duplication tasks or vendor orders.