The correct option is C mysterious meetings took place there
The correct answer for this would be option C, mysterious meetings took place there. The passage describes the peculiar locale after sundown. Option B suggests that the amphitheatre is suggestive because of its historical associations. The historical associations would make the place suggestive at all times, if at all, and not only during dusk. The place becomes more suggestive after sundown because of the questionable meetings and exchanges that took place there. The statements of the options A,D and E are unsupported by the text, and thus, are incorrect.