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An automated warehouse uses constraint satisfaction to schedule robot movements to avoid collisions. If the warehouse adds more robots, increasing contention for shared pathways, which outcome occurs?

A)Parallel search is always accelerated
B)Problem structure is automatically simplified
C)Heuristic repair becomes perfectly optimal
D)Backtracking search becomes computationally expensive

💡 Explanation

When robot density increases, the constraint satisfaction problem becomes more complex because more path conflicts arise, making backtracking search more computationally expensive. Arc consistency propagation reduces the search space, but increased contention necessitates deeper exploration; therefore, backtracking cost increases rather than search simplification.

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