Final answer:
The antonym of 'naïve' is 'experienced,' as it specifically relates to someone who has knowledge or wisdom gained through experience, in contrast to the lack of it implied by 'naïve.'
Step-by-step explanation:
The student asked for the antonym of “naïve.” Analyzing the options provided, the term that represents the opposite of naïve, which suggests a lack of experience, wisdom, or judgment, would be “d) experienced.” An experienced person is characterized by knowledge gained through experience, making them the converse of someone who is naïve. Other options such as “dangerous,” “reckless,” and “obedient” do not address the aspect of experience or wisdom, and thus are not suitable antonyms in this context.