Final answer:
Amy should use a DVD to borrow the movie, and Bruce needs a DVD-RW drive to be able to rewrite data on the used disc.
Step-by-step explanation:
In the given situation, Amy can hand over a DVD to contain the 900 MB movie file from Bruce. Considering that a typical CD only holds about 700 MB, it would not be sufficient for the file size mentioned. DVDs, on the other hand, usually start at 4.7 GB, which is enough to store a 900 MB file with plenty of room to spare. A hard drive, while capable of holding the file, is not a practical choice for simply borrowing a movie.
Bruce needs to have a DVD-RW drive to re-record data on the used DVD. 'DVD-RW' stands for 'DVD Rewritable', which means that the disc can be erased and written over multiple times. This is unlike a 'DVD-R' (Recordable) or 'DVD+R' (Recordable), where data can only be written once and the disc cannot be reused for recording new data.