A condominium developer has $2$ restrictive covenants in the declaration of restrictions. One is that all units be owned by unmarried persons and the other is all units must be used for residential purposes, if the first provision is declared invalid by court order. Will the second remain in force?

A$.$ Yes because it is not affected by the court order.

B$.$ Yes, because condominiums may not be used for commercial purposes

C$.$ No because once one provision is invalidated, the rest automatically become invalid.

D$.$ No because the developer must first receive the agreement of all affected parties before the second provision becomes valid again.