This is confusing

add 5 to each point

Just add 5 to each coordinate

(-3 + 5, -2 + 5) → (2, 3)

(5, 1) → (10 , 6)

(1, 4) → (6, 9)

So....D is correct

Here is a clip on translation

https://www.youtube.com/watch?v=r3lN_BADmPQ