Antonym of FURTIVE

Answer: Option D

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