The correct words for the blanks are (i) menacing and (ii) unprovoked.

Breakdown of the Blanks
- Blank (i): B. menacing

The sentence states that the Tasmanian devil is "not considered $\qquad$ " and the reason given is that only a "few of its confrontations with humans have been $\qquad$ ." The first blank needs a word that describes a perceived threat. Menacing means suggesting the presence of danger; threatening. This word fits the context of an animal that could be considered dangerous to humans.
- Blank (ii): F. unprovoked

The second blank must explain why the animal is not considered menacing. The sentence provides a reason for its reputation: its attacks on humans are rare and happen under a specific condition. Unprovoked means an action that is not caused by anything done or said. The sentence suggests that since most of the confrontations were not random or without cause, the animal is not seen as an inherent threat.