The prices went up alot because of taxes
I would go with A) Tablet because that's basically a bigger phone and mobile cmp combined, its not D) because that's a synonym for a smartphone and not C) because paper and pencil is not like a smartphone, and not B) because that's like reading online books.
With digital technology, the storage method has changed and today it is much easier to handle and transport movies to theatres than in the past. Servers, hard disks and video tapes are being used to store movies and digital projectors are being used to screen them.
