In order to improve vulnerability consideration, we can use ________

A)
high lift device
B)
vortex generator
C)
we cannot improve it
D)
redundant components

Correct Answer :   redundant components


Explanation : Redundant components in simple words are additional components which can be used at the time of emergencies or failure of the component. For example, redundant of hydraulic system, electric system, etc. can improve survivability. Hence, by using redundant component we can improve the vulnerability of our design.