GRE Text Completion: JiJing 1373-GRE填空机经1373题 - Z8C5TN4N2CKZ7426A

The Red Sea town of Aydhab presents scholars with ____________: medieval records describe it as a major port for ships engaged in trade, yet today there is no trace of a viable harbor at the site. A. an illusion B. a contradiction C. a chimera D. a puzzle E. an anachronism F. a conundrum