Final answer:
Both condominium and cooperative apartment owners are required to pay assessments to cover common expenses of the property, but condominium owners directly own real property while cooperative owners hold shares of stock.
Step-by-step explanation:
The correct statement regarding both the owners of a condominium unit and the owners of a cooperative apartment is that they must pay assessments. Assessments are the charges that the condominium or cooperative association levies on unit owners to cover common expenses, these expenses often include maintenance of communal areas, building repairs, and amenities. While the condominium owner holds real property, the cooperative apartment owner holds shares of stock in the corporation that owns the property and gets a proprietary lease, not as direct ownership of real estates. Property taxes are typically the responsibility of the condo owner directly, whereas in a housing cooperative, the corporation is usually responsible for the property taxes, the cost of which is shared among the shareholders through their monthly maintenance fees or special assessments.