Which of the following statement

Which of the following statements is NOT true? （ ）
A、In modern times，borrowing brings less than ten percent of modern English vocabulary.
B、Old English vocabulary was in essence Germanic with a small quantity of words borrowed from Latin and Scandinavian.
C、The most important mode of vocabulary development in present-day English is creation of new words by means of word-formation.
D、​In early Middle English period，English，Latin，and Celtic existed side by side.
【正确答案】：D
【题目解析】：中世纪英语早期，英语、法语和拉丁语并存，而不是凯尔特语。