In a petition for declaration of nullity of marriage on psychological incapacity, can a later ground (absence of license) be barred by res judicata?

In a petition for declaration of nullity of marriage on psychological incapacity, can a later ground (absence of license) be barred by res judicata?

• A. The first judgment is not conclusive on the license ground.
• B. The second ground is new; not barred.
• C. The ground of lack of license could have been raised in the first petition; thus judgment conclusive as to validity of marriage.
• D. Res judicata does not apply to family law.

Answer: (C)