Quiz: Heavy Edge Definition

In HLD, a heavy edge connects a node to its child with the largest subtree. Node $v$ has children with subtree sizes $10$, $25$, and $8$. Which child gets the heavy edge?

1. A.The child with subtree size $10$
2. B.All children get heavy edges
3. C.The child with subtree size $8$
4. D.The child with subtree size $25$