Distinguish bar by prior judgment from conclusiveness of judgment. Which statement is correct?

• A. Bar by prior judgment bars a second action on the same claim; conclusiveness precludes relitigation of an issue in a different action.
• B. Bar by prior judgment concerns witnesses; conclusiveness concerns parties.
• C. Bar by prior judgment is about appellate affirmations; conclusiveness about res judicata.
• D. Bar by prior judgment applies only to criminal cases; conclusiveness applies to civil cases.

Answer: (A)