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What can occur when the control valve travel limits are reached under conditions of large amplitude demands?

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What can occur when the control valve travel limits are reached under conditions of large amplitude demands?

(a) Stall

(b) Structural damage

(c) Rate limiting

(d) Rate delimiting

This question was addressed to me in exam.

Enquiry is from Control Laws in FBW in section Fly by Wire Flight Control of Avionics

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The correct answer is (c) Rate limiting

To explain I would say: Rate limiting can occur when the control valve travel limits are reached under conditions of large amplitude demands. The behaviour under rate limiting conditions is non-linear and the onset and the effects are dependent on the amplitude and frequency of the input demand.

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