From CR book #6, 5th Ed, page 164.
I'd be grateful if someone could please explain why A is a stronger answer than E.
A seems out of scope to me (seems more like anecdotal support, but doesn't add to the linear argument with specific circumstances w.r.t Inca Trail or Machu Picchu).
E seems much more on point, by establishing that the degradation would continue, owed to an even more detrimental # of visitors than when the degradation previously occurred with smaller tourist #s.
Thank you very much for any guidance you're willing to share.