Quiz: Subtree as Range

You want to add $5$ to every node in the subtree of $v$. Using the Euler tour, tin[v] = 4 and tout[v] = 9. What range update do you perform on the flattened array?

1. A.Update positions $4$ through $9$ inclusive
2. B.Update only position $4$
3. C.Update positions $0$ through $9$
4. D.Update positions $4$ through $8$