Which of the following statements is NOT true?

Which of the following statements is NOT true?

A.Old English was a highly inflected language.

B.In early Middle English period, English, Latin and Celtic existed side by side.

C.The introduction of printing into England marked the beginning of modern English period.

D.The most important mode of vocabulary development in present-day English is creation of new words by means of word-formation.

正确答案是B