How does the data flow when moving records between two servers by using Database Links and an Agent installed on a middle-tier server? (Choose the best answer.) 

Answer options:

A. from the source database into flat files that are then loaded into the target database
B. directly from the source database to the target database
C. from the source database onto the server running the Agent and then into the target database
D. from the source database into the machine running ODI Studio and then into the target database

B

(https://docs.oracle.com/middleware/1213/odi/ODIUN.pdf page 2-3)