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← Logic & PuzzlesA signal interference analysis maps adjacent radio towers as a graph; which outcome occurs if the chromatic number exceeds available channels?
A)Increased tower broadcasting redundancy
B)Minimized signal-to-noise ratio achieved
C)Optimal channel allocation is guaranteed
D)Co-channel interference level increases✓
💡 Explanation
When the chromatic number exceeds available channels, the graph coloring (channel allocation) cannot avoid assigning the same channel to adjacent towers, because the chromatic number represents the minimum colors needed; therefore, co-channel interference increases, rather than optimal allocation, since channels are reused in close proximity.
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