Apparently the answer below is review countermeasure, but its also a systemic based countermeasure. Without the stall warning horn, a pilot react could of never occurred.
"A stall warning is activated during flight and the pilot immediately takes action to restore the IAS. This would be an example of
Select one:
an execution countermeasure
a planning countermeasure
a review countermeasure
a systemic-based countermeasure "
Go Beyond the text book, google this document.
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This is from CASA so better stick to it (for the purpose of exam), there are only three kinds of countermeasures according to CASA, Planning, Execution and Review.
For your question my best bet is the execution countermeasure. I can be wrong though.
Where did you find this question anyway?
