How many stall protection computers and what does their activation do

• A. 2 total. 1 activation triggers stick shaker; 2 triggers stick pusher
• B. 2 total. Both activations trigger stick shaker
• C. 1 total. Activation triggers stick shaker
• D. 3 total. 1 triggers stick shaker; others do nothing

Answer: (A)

Two stall protection computers provide redundancy, each with its own protective output. One computer, when it detects a stall tendency, activates the stick shaker to give the pilot a rapid tactile warning. The other computer activates the stick pusher to automatically reduce angle of attack and help prevent a stall.

So there are two computers total, and their activations perform two different actions: one triggers the stick shaker, the other triggers the stick pusher. The other options don’t fit because they either change the number of computers or assign the same action to both activations, which would remove either the warning or the automatic protection.