Final answer:
Proteins entering the cis Golgi network A) can either move onward through the Golgi stack or be returned to the ER. They can also be C) sorted to different organelles or to the plasma membrane, depending on their destination. Hence, A and C are correct.
Step-by-step explanation:
The proteins entering the cis Golgi network can either move onward through the Golgi stack or be returned to the ER. They are processed and modified within the Golgi apparatus, and then additional transport vesicles containing the modified proteins and lipids pinch off from the Golgi apparatus' trans face.
These outgoing vesicles can fuse with the plasma membrane or the membrane of other organelles, depending on their final destination.