premise: Exactly five volunteers—Haddad, Joslin, Kwon, Molina, and Nash—are being assigned to three community committees—X, Y, and Z. Each committee will have three volunteers assigned to it, with each volunteer on a committee holding exactly one of three positions—leader, secretary, or treasurer. The following conditions apply: If Nash is assigned to a committee, Nash must be the leader for that committee. Molina must be assigned to exactly one committee. Kwon must be assigned to Y but cannot be assigned to Z. Joslin must be the secretary for Y but cannot be assigned to X or Z. Which one of the following, if substituted for the condition that Molina must be assigned to exactly one committee, would have the same effect in determining the assignment of volunteers to committees?
hypothesis: Molina must be assigned to more committees than Haddad.