Which risk substantially increases when inlet guide vanes on a jet engine's turbine fail to adjust optimally?

💡 Explanation

Inlet guide vane misalignment causes non-optimal airflow angles hitting compressor blades, initiating a stall. Compressor stall margin lowers because skewed airflow reduces the pressure rise before flow reversal. Therefore A, rather than creep, consumption, or lubricant behavior, is the primary impact.

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