Final answer:
When A sells her share to D, the ownership status changes from joint tenancy to tenancy in common.
Step-by-step explanation:
When A sells her share to D, the new status of the ownership changes from joint tenancy to tenancy in common. In joint tenancy, each co-owner has an equal share and a right of survivorship. However, with tenancy in common, each co-owner can sell or transfer their share independently without the consent of the other co-owners. So, after A sells her share to D, the property is now owned by B, C, and D as tenants in common.