infantile - immature, childish
charlatan - who pretend to have expert knowledge or skill
imbecile - stupid person, fool
awful - bad, unpleasant
childlike - quality of innocence
While "infantile," "charlatan," "imbecile," and "awful" all carry negative or disapproving connotations, "childlike" has a more neutral or even positive meaning, often referring to innocence rather than something negative. Therefore, Option D is the correct answer.
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