A bite of wisdom

What word describes something that's absolutely necessary or important?

Superfluous

Optional

Vital

Redundant

Come back tomorrow
for more questions!

vital

1. absolutely necessary or important; essential

"secrecy is of vital importance"

Choice "A": Superfluous % of users selected this choice.
Choice "B": Optional % of users selected this choice.
Choice "C": Vital % of users selected this choice.
Choice "D": Redundant % of users selected this choice.