I would pick "other". Our cats will sit or stand on whatever they feel like. I have a pic of one of our cats sitting on my Kindle (with the pic of the birds - which was cute), right after I set it down on my dresser. They will also sit on or in front of a paper book, regardless if it is being read or not.
Not only do the sit on our reading materials, they walk in front of our tv, in front of our monitors, or on our keyboards, as well.