Final answer:
The correct answer is C. menacing, which is used to describe a situation, person, or thing that suggests a threat or danger.
Step-by-step explanation:
The word suggesting the presence of danger; threatening is C. menacing. This adjective is used to describe something that implies a threat or a sense of danger. Examples where the term 'menacing' could be applied include a stormy weather condition described as threatening, a person using coercion and intimidation, or in literature, a gloomy and potentially dangerous atmosphere.