Answer:
If you do not know you are a brain in a vat, you do not have hands.
Explanation:
This premise is plausible as to understand the handless brain which is floating in a vat. The brain is connected to a super computer and it transmits messages to the brain. The brain receives those message and give signals to perform tasks.
Whenever you create a new slide, it appears below the selected slide.
If you have 2 slides and want one in between the two select the first slide and then select new slide.
When I answered this it was C