Did You Know Ponies?

There was an unreleased My Little Pony special planned to release after Rescue at Midnight Castle but before Escape from Katrina. A few rare seconds of this special be seen in C) at the end of the Rescue at Midnight Castle VHS. It was "involve the Rainbow Ponies and bring back several of the cast from the first episode" says Lost Media Wiki. The European box art for the Escape from Katrina VHS seems based more on the Rainbow Ponies and little of the actual Katrina special, so this could have been a remnant of this unreleased special.

Which modern-day technology have the Mane 6 not been seen with, contrary to Friendship is Magic's usual rule of past technology?

A) mobile phone
B) personal computer
C) television

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