A medieval manuscript called L contains all eighteen extant tragedies by the Greek play wright Euripides. Of these, ten called the "select plays," are accompanied in L by ancient commentaries and also apprea in other medieval manuscripts; this group includes some of Euripides' best-known works, including the Medea. The other eight, which appear in alphabetical order, without commentary. The Electra is one of the alphabeticals. Which of the following can be reliably concluded on the basis of the Statements given? A. Only Euripides' best-known works are accompanied by ancient commentaries in extant medieval manuscripts. B.The select plays are accompanied by ancient commentaries because they were the best known of Euripides' works. C.No commentaries were written about Euripides' Electra in ancient times. D.Euripides' Medea never appears in medieval manuscripits unaccompanied by ancient commentary. E.Euripides' Electra does not appear accompanied by a commentary in any extant medieval manuscript. 答案是E，但C和D让我很困惑，哪位NN指点一下？打字好累也。。。 | 
