Which sentence from the article supports the idea that historic landmarks in athens are in danger? a athens is the largest city, with over 3.7 million people crowding the metropolis. b the parthenon, the temple to goddess athena atop the acropolis, is deteriorating due to pollution and acid rain. c athens became the most powerful, and in 508 b. c., the people instituted a new system of rule by the people called democracy. d the games were banned by the romans in a. d. 393, but began again in athens in 1896.