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Which risk increases when the coherence length in an optical fiber communication drops rapidly?

A)Increased frequency dependent signal attenuation
B)Higher energy consumption within repeaters
C)Reduced effectiveness of error correction
D)Increased intersymbol interference between pulses

💡 Explanation

Increased intersymbol interference results because reduced coherence causes increased pulse broadening due to chromatic dispersion; therefore, ISI increases rather than reduced signal attenuation, which is unrelated and handled by separate mechanisms.

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