题目内容：
The almost bare sheets in the file mocked the effort.A. She tried in vain to write the obituary.
B. She made great effort to write the obituary because Cliff`s records were not complete.
C. She made great effort to write the obituary because Cliff`s records were not complete
D. She made great effort to write the obituary because there wasn`t much information inrecord
参考答案：