May res judicata be a defense in an action for support when a prior case was dismissed with prejudice due to compromise of the right to support?

• A. Yes, res judicata bars the second action.
• B. Res judicata bars only if the ground is identical to the first action.
• C. No, res judicata is not a defense because compromise of support rights is prohibited; the second action may proceed.
• D. Res judicata applies to all cases.

Answer: (B)