24. Two players, A and B, are playing a game. They take turns removing one or two adjacent bricks from a brick wall. Gaps may create new walls, and the walls are only one brick high. For example, a group $(4,2)$ can be transformed into any of the following by a move: $(3,2),(2,1,2),(4),(4,1),(2,2)$, or $(1,1,2)$, as shown in Figure 4. A starts the game, and the player who makes the last move wins. For ( ) initial configurations, B has a strategy to ensure a win.
(A) $(6,1,1)$
(B) $(6,2,1)$
(C) $(6,2,2)$
(D) $(6,3,1)$
(E) $(6,3,2)$
24. B.
$(6,1,1)$ can be transformed into the symmetric form $(2,2,1,1)$, so no matter how Player B moves, Player A can always make a symmetric move, and Player A will move the last brick to win, causing Player B to lose.
$(6,3,1)$ can be transformed into $(3,1,3,1)$, causing Player B to lose; $(6,2,2)$ can be transformed into $(2,2,2,2)$, causing Player B to lose; $(6,3,2)$ can be transformed into $(3,2,3,2)$, causing Player B to lose. Therefore, the opening $(6,2,1)$ allows Player B to win.