The correct answer is D. Archibald's plan is so stupid, it might just be brilliant.
Step-by-step explanation:
Paradoxes are statements that seem impossible because they are inherently contradictory, which often means they include contradictory terms. An example of this is "Archibald's plan is so stupid, it might just be brilliant" because, in this statement, the speaker is claiming Archibald's plan is both stupid and brilliant, which is contradictory. Indeed, the terms "stupid" and "brilliant" act as antonyms. According to this, the example of a paradox is option D.