Gertie and Frank's marriage in a skilled nursing center, due to their condition, represents a(n) ______ contract.

The correct answer is that Gertie and Frank's marriage in a skilled nursing center, due to their condition, represents a voidable contract. A voidable contract is one that may be legally enforced but can also be voided at the discretion of one of the parties involved. In the context of marriage, certain conditions such as mental capacity play a crucial role.

If either party lacks the mental capacity to understand the nature and consequences of marriage due to their condition, the marriage may be considered voidable. This means that while the marriage is valid at the time it is entered into, one or both parties have the legal right to annul or dissolve the marriage if they choose to do so later.

A valid contract implies that both parties have the capacity and intention to contract, which may not be applicable in this situation due to the discussed impairments. An invalid contract refers to an agreement that cannot be enforced by law from the moment it is created, typically due to illegal purposes or a fundamental lack of capacity. Finally, the term legitimate usually refers to being lawful according to the accepted rules or standards, which does not specifically apply to the type of contract represented by Gertie and Frank's marriage in a nursing center under their conditions.

Thus,