custom/otherstuff/BranchA_advancement.json

{
    "display": {
        "icon": {
            "item": "minecraft:stick"
        },
        "title": "Branch",
        "description": "One branch of the tree.",
        "frame": "task"
    },
    "parent":"custom:stuff/root",
    "criteria": {
        "Criteria_Name": {
            "trigger": "minecraft:inventory_changed",
            "conditions": {
                "items": [
                    {
                        "item": "minecraft:stone",
                        "data": 0
                    },
                    {
                        "item": "minecraft:enchanting_table"
                    }
                ]
            }
        }
    },
    "rewards": {
        "experience": 20
    }
}