Explanation:

- Option 1: Felicitate

- "Felicitate" means to congratulate or to make happy. It is not related to assisting a process.

- Option 2: Complicate

- "Complicate" means to make something more difficult or complex. Banks aim to simplify or assist in the sale process, not complicate it.

- Option 3: Confuse

- "Confuse" means to cause someone to be bewildered. Similarly, banks help to clarify, not confuse, the sale process.

- Option 4: Facilitate

- ? "Facilitate" means to make something easier or to assist in the process. This is the correct context of assistance by the banks in the consortium.