A. straight
B. obvious
C. unambiguous
D. open
Furtive : attempting to avoid notice or attention, typically because of guilt or a belief that discovery would lead to trouble; secretive.
Straight : extending or moving uniformly in one direction only; without a curve or bend.
Obvious : easily perceived or understood; clear, self-evident, or apparent.
Unambiguous : not open to more than one interpretation.
Open : freely available or accessible; unrestricted.
Antonym of Furtive is Open
